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Exploring the role of secondary attachment relationships in the development of attachment security.

Description: The process by which earned-secures achieve attachment security in adulthood, despite having insecure parent-child relationships in childhood, was the focus of the current study. As internal working models are thought to be formed within relationships, specifically primary attachment bonds (Bowlby, 1969), it was postulated that secondary attachment relationships, specifically those that were positive, had the capacity to revise insecure models of self and other. In the current study, the secondary attachment histories of undergraduates who were earned-secure and continuously-insecure, or insecurely attached since childhood, were compared. A new measure of secondary attachment quality was developed (Questionnaire About Secondary Attachment Figures (Q-SAF)), which was used to measure undergraduates' perceptions of their past and current secondary attachment figures. Findings indicated that in comparison to continuous-insecures, earned-secures perceived their negative secondary attachment figures in adolescence as less mean. Earned-secures also reported being less dependent upon these figures' approval of them for their self-worth and more secure within these relationships. In adulthood, earned-secures reported more trust and intimacy with their positive secondary attachment figures. Compared to continuous-insecures, earned-secures described their peers as being more empathic and altruistic during childhood and more warm during adolescence; earned-secures also reported less dependency and greater closeness with their peers throughout development. Grandparents were listed the most frequently by earned-secures as positive secondary attachment figures during childhood and this number was more than double that for continuous-insecures. Further, earned-secures described their grandparents in childhood as being more altruistic and they reported being less concerned with receiving their acceptance. Siblings from childhood were described by earned-secures as being more empathic than those of continuous-insecures, yet earned-secures also reported greater dismissing attachment to their siblings and cousins in childhood. Significant others from adolescence were rated by earned-secures as being less mean than those of continuous-insecures and earned-secures reported being more securely ...
Date: August 2005
Creator: Cohen, Diane L.
Partner: UNT Libraries

Exploring Trusted Platform Module Capabilities: A Theoretical and Experimental Study

Description: Trusted platform modules (TPMs) are hardware modules that are bound to a computer's motherboard, that are being included in many desktops and laptops. Augmenting computers with these hardware modules adds powerful functionality in distributed settings, allowing us to reason about the security of these systems in new ways. In this dissertation, I study the functionality of TPMs from a theoretical as well as an experimental perspective. On the theoretical front, I leverage various features of TPMs to construct applications like random oracles that are impossible to implement in a standard model of computation. Apart from random oracles, I construct a new cryptographic primitive which is basically a non-interactive form of the standard cryptographic primitive of oblivious transfer. I apply this new primitive to secure mobile agent computations, where interaction between various entities is typically required to ensure security. I prove these constructions are secure using standard cryptographic techniques and assumptions. To test the practicability of these constructions and their applications, I performed an experimental study, both on an actual TPM and a software TPM simulator which has been enhanced to make it reflect timings from a real TPM. This allowed me to benchmark the performance of the applications and test the feasibility of the proposed extensions to standard TPMs. My tests also show that these constructions are practical.
Date: May 2008
Creator: Gunupudi, Vandana
Partner: UNT Libraries

Exploring Volunteer Management in the Public Sector: What are the Challenges in Managing Volunteers in Local Government?

Description: To effectively provide services to citizens, local governments have had to be creative. One approach has been the creation of volunteer programs to meet demands and expanding needs. Volunteer programs hold promise for creating meaningful engagement opportunities for citizens. However, limited organizational capacity, inadequate volunteer management practices, and difficulties in maintaining volunteer retention are concerns plaguing local government volunteer programs. Volunteer programs are often structured around a set of best practices thought to be necessary for ensuring the retention of volunteers. To apply best practices across the board would suggest that local government volunteer programs are similar in organizational structure, budget size, amount of citizen engagement, accountability concerns, and that they adopt similar bureaucratic procedures. Using human relations and bureaucratic theories as theoretical frameworks, four research questions are asked and answered: 1) What are the managerial and political challenges in volunteer management and retention for local government volunteer coordinators?, 2) What challenges are local governments' volunteer coordinators facing in using volunteer management practices?, 3) What strategies are helpful in retaining volunteers in local government volunteerism?, and 4) What challenges do local government volunteer coordinators face in engaging citizens? Data collection for this qualitative study was conducted using online surveys and telephone semi-structured interviews. The findings suggest that creating meaningful work for volunteers and coordinating this work with local government managers was an important "best practices" challenge. Although local government volunteer programs also have a mission of engaging citizens, the practices actually used may directly conflict with their mission. Many volunteer management practices are supporting organizational goals rather than supporting the needs of volunteers. The study findings suggest that the best practices used by local governments are not given equal weight and "one size does not fit all." Instead, local governments must prioritize their practices carefully.
Date: August 2016
Creator: Sillah, Aminata A
Partner: UNT Libraries

Exposing Deep-rooted Anger: A Metaphor Pattern Analysis of Mixed Anger Metaphors

Description: This project seeks to serve two purposes: first, to investigate various semantic and grammatical aspects of mixed conceptual metaphors in reference to anger; and secondly, to explore the potential of a corpus-based, TARGET DOMAIN-oriented method termed metaphor pattern analysis to the study of mixed metaphor. This research shows that mixed metaphors do not pattern in a manner consistent with statements made within conceptual metaphor theory. These metaphors prove highly dynamic in their combinability and resist resonance between SOURCE DOMAINS used. Also shown is the viability of metaphor pattern analysis as a methodology to approach mixed metaphor research.
Date: August 2011
Creator: Barron, Andrew T.
Partner: UNT Libraries

Exposure to and Attitudes Toward the Mass Media of Students at Sam Houston High School

Description: This study was concerned with determining the amount of exposure high school students have to mass media and their attitudes toward news. The purposes of this study were to find how much time high school students devote to newspapers, radio, television, and magazines for entertainment and information, to discover which publications or channels students are most interested in and why; to find out specifically what young people read, listen to, and watch; to discover how most of them get their news information; and to determine positive and negative feelings toward media news.
Date: August 1973
Creator: Davis, Lina Jean
Partner: UNT Libraries

Expression analysis of the fatty acid desaturase 2-4 and 2-3 genes from Gossypium hirsutum in transformed yeast cells and transgenic Arabidopsis plants.

Description: Fatty acid desaturase 2 (FAD2) enzymes are phosphatidylcholine desaturases occurring as integral membrane proteins in the endoplasmic reticulum membrane and convert monounsaturated oleic acid into polyunsaturated linoleic acid. The major objective of this research was to study the expression and function of two cotton FAD2 genes (the FAD2-3 and FAD2-4 genes) and their possible role in plant sensitivity to environmental stress, since plants may increase the polyunsaturated phospholipids in membranes under environmental stress events, such as low temperature and osmotic stress. Two FAD2 cDNA clones corresponding to the two FAD2 genes have been isolated from a cotton cDNA library, indicating both genes are truly expressed in cotton. Model yeast cells transformed with two cotton FAD2 genes were used to study the chilling sensitivity, ethanol tolerance, and growth rate of yeast cells. The expression patterns of the two FAD2 genes were analyzed by reverse transcription polymerase chain reactions (RT-PCR) and Western blot analyses in cotton plants under different treatment conditions. The coding regions of both FAD2 genes were inserted downstream from the CaMV 35S promoter in the pMDC gateway binary vector system. Five different FAD2/pMDC constructs were transformed into the Arabidopsis fad2 knockout mutant background, and multiple potential transgenic Arabidopsis plant lines harboring the cotton FAD2 genes were generated. The cotton FAD2 genes were amplified by the polymerase chain reaction (PCR) from the genomic DNAs isolated from the transgenic Arabidopsis T1 plant lines. Complementation of the putative transgenic Arabidopsis plants with the two cotton FAD2 genes was demonstrated by gas chromatography analyses of the fatty acid profiles of leaf tissues. The cellular localization of cotton FAD2-4 polypeptides with N-terminal green fluorescence protein (GFP) was visualized by confocal fluorescence microscopy. The phenotype of transgenic Arabidopsis plants transformed with the cotton FAD2-4 gene was compared to Arabidopsis knockout fad2 mutant plants and wild ...
Date: August 2008
Creator: Zhang, Daiyuan
Partner: UNT Libraries

Expression of G-protein Coupled Receptors in Young and Mature Thrombocytes and Knockdown of Gpr18 in Zebrafish

Description: In this study, a novel method based on biotinylated antibodies and streptavidin coated magnetic beads was used to separate the thrombocyte subpopulations from zebrafish whole blood. DiI-C18, a lipophilic dye, labels only young thrombocytes when used at low concentrations. Commercially available biotinylated anti-Cy3 antibody was used to label the chromophore of DiI-C18 on the young thrombocytes and streptavidin coated magnetic beads were added subsequently, to separate young thrombocytes. The remaining blood cells were probed with custom-made biotinylated anti-GPIIb antibody and streptavidin magnetic beads to separate them from other cells. Further, thrombocytes are equivalents of mammalian platelets. Platelets play a crucial role in thrombus formation. The G-protein coupled receptors (GPCRs) present on the platelet surface are involved during platelet activation and aggregation processes. So, thrombocytes were studied for the presence of GPCRs. The GPCR mRNA transcripts expressed in the young and mature thrombocytes were subjected to densitometry analysis and pixel intensities of the bands were compared using one way ANOVA. This analysis did not show significant differences between the young and mature GPCR mRNA transcripts but identified a novel GPCR, GPR18 that was not reported in platelets earlier. To study the function of this GPCR, it was knocked down using GPR18 specific antisense morpholino and vivo morpholino. The immunofluorescence experiment indicated the presence of GPR18 on thrombocytes. The results of the assays, such as, time to occlusion (TTO) and time to aggregation (TTA) in response to N-arachidonyl glycine (NAG) as an agonist, showed prolongation of time in GPR18 larval and adult morphants respectively, suggesting that GPR18 plays a role in thrombus formation in zebrafish. In conclusion, our results indicate that GPR18 may be present in zebrafish thrombocytes, it may be involved in thrombus formation and that NAG may be an agonist at GPR18 on thrombocytes.
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Date: May 2013
Creator: Potbhare, Vrinda Nikhil
Partner: UNT Libraries

Expression of granulocyte-macrophage colony-stimulating factor gene in insect cells by a baculovirus vector

Description: The focus of this research is to describe the production and characterization of the human granulocyte-macrophage colony-stimulating factor (hGM-CSF) in insect cells, using Autographa californica buclear polyhedrosis virus (AcNPV) as an expression vector.
Date: December 1989
Creator: Chiou, Chuang-Jiun
Partner: UNT Libraries

Expressive Arts Therapy with Bereaved Families

Description: Most current grief programs support the children and/or parents of bereaved families rather than the family as a whole. This exploratory study was a quantitative and qualitative investigation of the use of expressive arts therapy with bereaved families during a weekend camp experience and a series of followup sessions. The purpose of the study was to determine the effectiveness of using expressive arts activities in improving the functioning of the bereaved family as a whole as well as individual family members. Participants included eight families who lost a child to a chronic illness between 2 to 36 months months prior to the onset of the study. Children ranged in age from 3 to15, and parents ranged in age from 26 to 66, for a total of 27 participants. The Child Life Department at Children's Medical Center of Dallas, a division of The University of Texas Southwestern Medical Center in Dallas, Texas recruited the families. Participants received flyers and invitational letters and registered through the mail. Families attended a weekend camp where they experienced a wide variety of expressive arts activities in a combination of group formats: multi-family groups, parents' group, developmental age groups for children, total childrens' group, individual family group, mothers' group, and fathers' group. The research design was a pretest/posttest quasi-experimental control group design, but a control group could not be established. Therefore, one-tailed t-tests were used to compare participant functioning between the beginning and end of the study. Instruments used in this study included the Family Environment Scale, the Behavior Assessment System for Children the Beck Anxiety Inventory and the Beck Depression Inventory. In addition, the researcher used qualitative analysis to assess contents of family members' and counseling staff's journals, expressive arts products, and family members' evaluations. Results of this exploratory study indicated some improvements in children's, ...
Date: August 2001
Creator: Webb-Ferebee, Kelly
Partner: UNT Libraries

Expulsion of Carriers from the Double-Barrier Quantum Well and Investigation of Its Spectral and Transport Consequences

Description: In this work I investigate the expulsion of carriers from nanostructures using the double-barrier quantum well (DBQW) as an example and discuss manifestations of this effect in the spectrum of the DBQW in absence of bias, and in the tunneling current in presence of bias. Assuming equality of the Fermi energy in all regions of the considered system, I compute the relative density of carriers localized in the DBQW and conclude that a fraction of carriers is expelled from this nanostructure.
Date: March 1992
Creator: Chyla, Wojciech Tadeusz
Partner: UNT Libraries

Extemporizing Reawakened: Saxophonist Branford Marsalis's Approach to the Cadenza for Concertino da Camera for Alto Saxophone and Eleven Instruments by Jacques Ibert

Description: Whether provided by a composer, written out by a performer or completely improvised, the cadenza became a vehicle for performers' creativity, lyricism and technical prowess in the eighteenth and nineteenth centuries. The debate about whether to notate or improvise cadenzas, a question as old as the cadenza itself, continues today. Saxophonists have not been involved in this debate, since the instrument is a product of the mid-nineteenth century and was in its infancy just as the practice of improvising cadenzas was fading. This study documents an unprecedented, recently-recorded, improvised cadenza in one of the most significant twentieth-century saxophone works: Jacques Ibert's Concertino da Camera for Alto Saxophone and Eleven Instruments (1935). Saxophonist Branford Marsalis's neo-cadenza for Ibert's composition presents an aggregate of the twenty-first-century performer improvising a cadenza to a twentieth-century work, in a tradition that was common centuries ago. The document begins with an inquiry into improvised cadenzas, and proceeds to an examination of the performance history of the cadenza for the Concertino da Camera. Twenty professionally-recorded versions of the cadenza are presented in order to understand the performance history of the cadenza, and to place the Marsalis cadenza into context. This research culminates in a transcription and analysis of the cadenza as improvised and recorded by Marsalis. Remarks from a personal interview with Marsalis are also included.
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Date: December 2006
Creator: James, Matthew T.
Partner: UNT Libraries

Extended performance techniques and compositional style in the solo concert vibraphone music of Christopher Deane.

Description: Vibraphone performance continues to be an expanding field of music. Earliest accounts of the presence of the vibraphone and vibraphone players can be found in American Vaudeville from the early 1900s; then found shortly thereafter in jazz bands as early as the 1930s, and on the classical concert stage beginning in 1949. Three Pieces for Vibraphone, Opus 27, composed by James Beale in 1959, is the first solo concert piece written exclusively for the instrument. Since 1959, there have been over 690 pieces written for solo concert vibraphone, which stands as evidence of the popularity of both the instrument and the genre of solo concert literature. Christopher Deane has contributed to solo vibraphone repertoire with works that are regarded as staples in the genre. Deane's compositions for vibraphone consistently expand the technical and musical potential of the instrument. Performance of Deane's vibraphone works requires a performer to utilize grips and specific performance techniques that are departures from standard performance practices. Many of the performance techniques needed to successfully execute these pieces are not routinely found in either percussion pedagogy courses or performance ensemble situations. As a result, most percussionists are not familiar with these techniques and will require additional assistance, instruction, or demonstrations. The impetus of this document is to present explanations and solutions for performance areas that require extended performance techniques, to offer recommendations on the creation, choosing, and manipulating of special implements, and to propose varied choices related to artistic interpretation of three of Deane's vibraphone pieces: Mourning Dove Sonnet (1983), The Apocryphal Still Life (1996), and Dis Qui Etude (2004).
Date: August 2008
Creator: Smith, Joshua D.
Partner: UNT Libraries

Extended Techniques in Stanley Friedman's Solus for Unaccompanied Trumpet

Description: This document examines the technical execution of extended techniques incorporated in the musical structure of Solus, and explores the benefits of introducing the work into the curriculum of a college level trumpet studio. Compositional style, form, technical accessibility, and pedagogical benefits are investigated in each of the four movements. An interview with the composer forms the foundation for the history of the composition as well as the genesis of some of the extended techniques and programmatic ideas.
Date: May 2008
Creator: Meredith, Scott
Partner: UNT Libraries

Extensions of the General Linear Model into Methods within Partial Least Squares Structural Equation Modeling

Description: The current generation of structural equation modeling (SEM) is loosely split in two divergent groups - covariance-based and variance-based structural equation modeling. The relative newness of variance-based SEM has limited the development of techniques that extend its applicability to non-metric data. This study focuses upon the extension of general linear model techniques within the variance-based platform of partial least squares structural equation modeling (PLS-SEM). This modeling procedure receives it name through the iterative PLS‑SEM algorithm's estimates of the coefficients for the partial ordinary least squares regression models in both the measurement model and the overall structural model. This research addresses the following research questions: (1) What are the appropriate measures for data segmentation within PLS‑SEM? (2) What are the appropriate steps for the analysis of rank-ordered path coefficients within PLS‑SEM? and (3) What is an appropriate model selection index for PLS‑SEM? The limited type of data to which PLS-SEM is applicable suggests an opportunity to extend the method for use with different data and as a result a broader number of applications. This study develops and tests several methodologies that are prevalent in the general linear model (GLM). The proposed data segmentation approaches posited and tested through post hoc analysis of structural model. Monte Carlo simulation allows demonstrating the improvement of the proposed model fit indices in comparison to the established indices found within the SEM literature. These posited PLS methods, that are logical transfers of GLM methods, are tested using examples. These tests enable demonstrating the methods and recommending reporting requirements.
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Date: August 2016
Creator: George, Benjamin Thomas
Partner: UNT Libraries

Extensions to Jinni Mobile Agent Architecture

Description: We extend the Jinni mobile agent architecture with a multicast network transport layer, an agent-to-agent delegation mechanism and a reflection based Prolog-to-Java interface. To ensure that our agent infrastructure runs efficiently, independently of router-level multicast support, we describe a blackboard based algorithm for locating a randomly roaming agent. As part of the agent-to-agent delegation mechanism, we describe an alternative to code-fetching mechanism for stronger mobility of mobile agents with less network overhead. In the context of direct and reflection based extension mechanisms for Jinni, we describe the design and the implementation of a reflection based Prolog-to-Java interface. The presence of subtyping and method overloading makes finding the most specific method corresponding to a Prolog call pattern fairly difficult. We describe a run-time algorithm which provides accurate handling of overloaded methods beyond Java's reflection package's limitations.
Date: May 2001
Creator: Tyagi, Satyam
Partner: UNT Libraries

The Extensive Subject File a Study of User Expectations in a Theological Library

Description: This study is concerned with determining how library patrons decide which entries to select from a subject card file which consists of numerous bibliographic records. Patrons are expected to select certain records based on elements that are objective (displayed directly by the record and requiring little or no interpretation) or subjective (recognized because of the user's special knowledge of the field).
Date: August 1984
Creator: White, Cecil R. (Cecil Ray)
Partner: UNT Libraries

The Extent of Autism Knowledge of Novice Alternatively Certified Special Education Teachers in Texas

Description: An increase in the prevalence rate of autism is not necessarily matched by a concurrent increase in the rate of highly qualified special education teachers. The low ratio of highly qualified teachers to the number of students with autism has resulted in chronic teacher shortages in this area. Alternative certification is used as a mechanism to alleviate the demand for highly qualified teachers in special education. However, alternative certification routes have often left novice teachers underprepared for teaching students with autism, more specifically in the implementation of evidence-based practices necessary for instructional effectiveness. The purposes of the study were: a) to assess the knowledge of novice alternatively certified (AC) teachers in the area of autism education; and b) to determine the extent to which age, credit hours of instruction, formal hours of instruction, amount of professional development, and number of students with autism predict the variance in knowledge scores. Participants included all novice (i.e., first-and second-year) alternatively certified special education teachers in the state of Texas. Data were collected through an electronic survey instrument disseminated state-wide to approximately 33 individuals. Multiple regression was conducted in order to determine the strongest predictors of autism knowledge scores. In addition, a multi-way ANOVA was performed to identify differences between groups. The largest predictor of knowledge of autism was hours engaged in self-directed learning. Overall, AC programs in Texas need to provide basic and core content in the area of autism to increase the knowledge of novice teachers.
Date: December 2013
Creator: Alward, Jennifer A.
Partner: UNT Libraries

The Extent of Cheating and Factors Related to Cheating in the Junior High School Grades

Description: Thesis studying instances of cheating in junior high school. According to the introduction, the purpose of the study is: 1. To determine the extent to which pupils in the junior high school grades will cheat when allowed to score their own examination papers. 2. To determine the relation between the professed attitude toward cheating on examinations and actual cheating behavior. 3. To determine some factors related to cheating (p. 1).
Date: August 1938
Creator: Watson, Lillian
Partner: UNT Libraries

The Extent of Obsolescence of Selected Canadian Business Managers

Description: The study's main purpose is to explore the problem of managerial obsolescence in Canada. The purpose is accomplished through establishing the importance of management techniques and concepts and through determining the managerial level of the understanding of these techniques and concepts. On the basis of the importance and understanding of management techniques and concepts, the study aims to develop an approach which would provide an approximation of the extent of management obsolescence.
Date: August 1970
Creator: Kothari, Vinay B.
Partner: UNT Libraries

The Extent to Which Businesses Use the Scientific Method in the Organization and Preparation of Written Business Reports

Description: The problem of this study was to investigate the extent to which businesses use the scientific method in the organization and preparation of written business reports. Data for this study were collected by the use of a questionnaire which was devised, validated, and pilot testes. Questionnaires were mailed to 50 systematically, selected members (200 total) of each of the four major group categories (banking and finance, government and education, manufacturing and utilities, and sales and services) from Region V's 1985-1986 Association of Records Managers and Administrators membership roster. One hundred six responses were received, representing a 53 per cent return. Additional information was obtained from sample records and telephone interviews.
Date: December 1986
Creator: Luse, Donna Walton
Partner: UNT Libraries