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 Collection: UNT Theses and Dissertations
Exploring the role of secondary attachment relationships in the development of attachment security.

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

Date: August 2005
Creator: Cohen, Diane L.
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 ...
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Exploring Trusted Platform Module Capabilities: A Theoretical and Experimental Study

Exploring Trusted Platform Module Capabilities: A Theoretical and Experimental Study

Date: May 2008
Creator: Gunupudi, Vandana
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 ...
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The Exponential Functions

The Exponential Functions

Date: 1947
Creator: Sloan, Robert S.
Description: The purpose of this paper is to clarify the problems of exponents by introducing notation not customarily used and by demonstrating certain theorems in regard to the properties of the exponential functions.
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Exposing Deep-rooted Anger: A Metaphor Pattern Analysis of Mixed Anger Metaphors

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

Date: August 2011
Creator: Barron, Andrew T.
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.
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Exposure to and Attitudes Toward the Mass Media of Students at Sam Houston High School

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

Date: August 1973
Creator: Davis, Lina Jean
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.
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Expression analysis of the fatty acid desaturase 2-4 and 2-3 genes from Gossypium hirsutum in transformed yeast cells and transgenic Arabidopsis plants.

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

Date: August 2008
Creator: Zhang, Daiyuan
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 ...
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Expression of G-protein Coupled Receptors in Young and Mature Thrombocytes and Knockdown of Gpr18 in Zebrafish

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

Access: Use of this item is restricted to the UNT Community.
Date: May 2013
Creator: Potbhare, Vrinda Nikhil
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 ...
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Expressive Arts Therapy with Bereaved Families

Expressive Arts Therapy with Bereaved Families

Date: August 2001
Creator: Webb-Ferebee, Kelly
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 ...
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Expropriation of American Oil Interests and its Effect on United States-Mexican Relations since 1938

Expropriation of American Oil Interests and its Effect on United States-Mexican Relations since 1938

Date: 1947
Creator: Buell, Erwin C.
Description: This thesis discusses the seizure of all foreign owned oil property by the Mexican government in 1938 and the historical events leading up to the seizure.
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Expulsion of Carriers from the Double-Barrier Quantum Well and Investigation of Its Spectral and Transport Consequences

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

Date: March 1992
Creator: Chyla, Wojciech Tadeusz
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.
Contributing Partner: UNT Libraries