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Temporally Correct Algorithms for Transaction Concurrency Control in Distributed Databases

Description: Many activities are comprised of temporally dependent events that must be executed in a specific chronological order. Supportive software applications must preserve these temporal dependencies. Whenever the processing of this type of an application includes transactions submitted to a database that is shared with other such applications, the transaction concurrency control mechanisms within the database must also preserve the temporal dependencies. A basis for preserving temporal dependencies is established by using (within the applications and databases) real-time timestamps to identify and order events and transactions. The use of optimistic approaches to transaction concurrency control can be undesirable in such situations, as they allow incorrect results for database read operations. Although the incorrectness is detected prior to transaction committal and the corresponding transaction(s) restarted, the impact on the application or entity that submitted the transaction can be too costly. Three transaction concurrency control algorithms are proposed in this dissertation. These algorithms are based on timestamp ordering, and are designed to preserve temporal dependencies existing among data-dependent transactions. The algorithms produce execution schedules that are equivalent to temporally ordered serial schedules, where the temporal order is established by the transactions' start times. The algorithms provide this equivalence while supporting currency to the extent out-of-order commits and reads. With respect to the stated concern with optimistic approaches, two of the proposed algorithms are risk-free and return to read operations only committed data-item values. Risk with the third algorithm is greatly reduced by its conservative bias. All three algorithms avoid deadlock while providing risk-free or reduced-risk operation. The performance of the algorithms is determined analytically and with experimentation. Experiments are performed using functional database management system models that implement the proposed algorithms and the well-known Conservative Multiversion Timestamp Ordering algorithm.
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Date: May 2001
Creator: Tuck, Terry W.

Teen ages: Youth market romance in Hollywood teen films of the 1980s and 1990s

Description: This thesis examines the differences between teen romantic comedy films marketed to Generation X teenagers in the 1980s and Generation Y teenagers in the 1990s, focusing on the presentation of gender roles, consumptive behavior, and family. The 1980s films are discussed within the social context of the Reagan era and the conservatism of the New Right. The 1990s films are examined as continuing a conservative sensibility, but they additionally posit consumption as instrumental to achieving an idealized romance. Romantic comedy is traditionally a conservative genre, but these films illustrate female liberation through consumption. The source of difference between the cycles of teen romantic comedy is attributed to the media's attempt to position Generation Y teenagers as ideal consumers.
Access: This item is restricted to UNT Community Members. Login required if off-campus.
Date: May 2001
Creator: Murphy, Caryn E.

Designing a Social Marketing Plan to Promote Hispanic Participation at Prostate Cancer Screenings

Description: Prostate cancer is the most commonly occurring cancer and the second leading cause of cancer death for men in the United States. Because early prostate cancer is frequently without symptoms and data on how to prevent prostate cancer is lacking, early detection has the greatest potential for decreasing mortality. Studies have shown Hispanics/Latinos to be less likely than whites or African-Americans to utilize prostate cancer screening exams. The purpose of this descriptive study was to design a social marketing plan which could be used as a model to promote Hispanic/Latino participation at prostate cancer screenings. Information obtained through medical and marketing literature review, the author's experiences serving on the promotion committee of a community-sponsored prostate cancer screening project, and interviews with 51 Hispanic/Latino prostate cancer screening participants is described and incorporated into a guide with recommendations for future program planners.
Date: December 1995
Creator: Zimmerman, Suzanne M. (Suzanne Marie)

Survey of the Solid State Conformation of Calix[4]arenes

Description: The characteristics of seventy-six calix[4]arene crystal structures derived from the Cambridge Crystallographic Database are presented. This survey is a discussion of the inter and intramolecular effects on the solid state cavity shape and molecular recognition ability of the compounds. In addition to this survey, four new calix[4]arene crystal structures are presented. The conformational characteristics of these four calixarenes are determined by a complicated array of inter and intramolecular interactions in the crystal packing.
Date: August 1997
Creator: Obrey, Stephen J. (Stephen James)

Interactions of Clean and Sulfur-modified Reactive Metal Surfaces with Aqueous Vapor and Liquid Environments : A Combined Ultra-high Vacuum/electrochemistry Study

Description: The focus of this research is to explore the molecular-level interactions between reactive metal surfaces and aqueous environments by combined ultra-high vacuum/electrochemistry (UHV-EC) methodology. The objectives of this work are to understand (1) the effects of sulfate ions on the passivity of metal oxide/hydroxide surface layer, (2) the effects of sulfur-modification on the evolution of metal oxide/hydroxide surface layer, and (3) the effects of sulfur adsorbate on cation adsorption at metal surfaces.
Date: May 1998
Creator: Lin, Tien-Chih, 1966-

Effects of Performance Levels of Subject Matter Experts on Job Analysis Outcomes

Description: Much research has been undertaken to determine how Subject Matter Expert characteristics affect job analysis outcomes. The current study seeks to discover if performance levels are related to current incumbents ratings of their positions. A group of 114 corporate associates, from two administrative positions, served as Subject Matter Experts (SME) for this study. Separate job analyses for each position were conducted using the Job Analysis Task Checklist. The results for each job were analyzed to determine if SME performance levels affected job analysis outcomes. The results for both jobs showed that there were very few differences in job analysis results as a function of SME performance levels.
Date: December 1997
Creator: Boyd, Charlotte Friedersdorff

Woodrow Wilson in the Council of Four: A Re-Evaluation

Description: It was Woodrow Wilson who played the dominant role in the Council of Four. With his dedication to the vague, often contradictory Fourteen Points, and with the power of the office of President of the United States supporting him, he determined the very nature of the treaty. Wilson's use, and misuse, of his influence over his colleagues makes him responsible for much of the final form of the Treaty of Versailles.
Date: January 1965
Creator: Brown, Dora M.

DNA Typing of HLA-B by PCR with Primer Mixes Utilizing Sequence-Specific Primers

Description: The aim of this study was to design a resolution typing system for the HLA-B gene. This technique involves a one-step PCR reaction utilizing genomic DNA and sequence-specific primers to determine the specificity of each allele and to produce a larger primer data base ideal for serological analysis. The application of this technique to serological analysis can improve serology detection which is currently hindered by antibody cross-reactivity and the unavailability of useful typing reagents.
Date: August 1997
Creator: Chiu, Angela Chen-Yen

A Study of the Relationships among Relational Maintenance Strategy Usage, Communicator Style and Romantic Relational Satisfaction

Description: This thesis examined student-participants' self-reported use of romantic relational maintenance strategies and their partners' reports of relational satisfaction. Additionally, individuals outside the romantic relationship reported on student-participants' general communicator style. The research proposed that general style reports would be predictive of relational maintenance strategy usage and of romantic partners' relational satisfaction. The study found that general style behaviors may not be indicative of relational maintenance strategy usage or romantic partners' relational satisfaction. Tests of sex differences revealed that females' expression of various relational maintenance strategies and style behaviors are associated with male partners' relational satisfaction; however, no results were obtained indicating specific behaviors expressed by males result in female partners' relational satisfaction.
Date: August 1996
Creator: Hardin, Charla (Charla LeeAnn)

Formalization of Collection Development in Selected Medium-sized Academic Libraries

Description: The degree of formalization of collection development(the dependent variable) in selected medium-sized academic libraries and six independent variables believed to be related to the dependent variable were examined. The formalization of collection development was measured by an index of five dimensions. The six independent variables examined were age of the library, number of graduate degrees offered by the parent institution, estimated years of growth potential in terms of available shelf space, attitude of the library director toward cooperation, number of memberships held by the library in cooperative endeavors, and percentage of increase in the materials budget, from 1972 to 1982.
Date: December 1984
Creator: Harvill, Melba S.

Masculine Role Conflict in Gay Men: Mediation of Psychological Well-Being and Help-Seeking Behaviors

Description: Gender role issues have been an integral part of psychology since the 1970s. More recently, theories and research have surfaced concerning the issues of maleness in our society. Most of these theories focus on masculine gender role and how it affects men in various ways, e.g., their psychological well-being, substance use, relational abilities, and help-seeking behaviors. One area of maleness that has consistently been left out of the Masculine Role Conflict (MRC) debate is that of homosexuality. As a gay man develops, he finds himself at odds with society over something that he experiences biologically as normal and appropriate. It is the contention of this paper that MRC is an issue related to psychological distress among gay men and not psychological weakness in gay men, per se.
Date: August 1998
Creator: Simonsen, Gregory

A Political and Macroeconomic Explanation of Public Support for European Integration

Description: This study develops a model of macroeconomic and political determinants of public support for European integration. The research is conducted on pooled cross-sectional time-series data from five European Union member states between 1978 and 1994. The method used in this analysis is a Generalized Least Squares - Autoregressive Moving Average approach. The factors hypothesized to determine a macroeconomic explanation of public support for integration are inflation, unemployment, and economic growth. The effect of the major economic reform in the 1980s, the Single European Act, is hypothesized to act as a positive permanent intervention. The other determinants of public support are the temporary interventions of European Parliament elections and the permanent intervention of the Maastricht Treaty in 1992. These are hypothesized to exert a negative effect. In a fully specified model all variables except economic growth and European Parliament elections demonstrate statistical significance at the 0.10 level or better.
Date: August 1997
Creator: Carey, Sean D. (Sean Damien)

Isolation and analysis of cotton genomic clones encompassing a fatty acid desaturase (FAD2) gene

Description: Polyunsaturated fatty acids are major structural components of plant chloroplast and endoplasmic reticulum membranes. Two fatty acid desaturases (designated FAD2 and FAD3) desaturate 75% of the fatty acids in the endoplasmic reticulum. The w -6 fatty acid desaturase (FAD2) may be responsible for cold acclimation response, since polyunsaturated phospholipids are important in helping maintain plant viability at lowered temperatures. To study regulation of FAD2 gene expression in cotton, a FAD2 gene was isolated from two genomic libraries using an Arabidopsis FAD2 hybridization probe and a cotton FAD2 5¢ -flanking region gene-specific probe, respectively. A cotton FAD2 gene was found to be in two overlapping genomic clones by physical mapping and DNA sequencing. The cloned DNA fragments are identical in size to cotton FAD2 genomic DNA fragments shown by genomic blot hybridization. The cotton FAD2 coding region has 1,155 bp with no introns and would encode a putative polypeptide of 384 amino acids. The cotton FAD2 enzyme has a high identity of 75% with other plant FAD2 enzymes. The enzyme has three histidine-rich motifs that are conserved in all plant membrane desaturases. These histidine boxes may be the iron-binding domains for reduction of oxygen during desaturation. To confirm that this FAD2 enzyme is functional, a plasmid construct containing the cotton FAD2 coding region was transformed into Saccharomyces cerevisiae. The transformed yeast cells were able to catalyze the conversion of oleic acid (C18:1) into linoleic acid (C18:2). The FAD2 gene contains an intron of 2,967 bp in its 5¢ -flanking region, 11 bp upstream from the initiation codon. The intron could be essential for transcriptional regulation of FAD2 gene expression. Several putative promoter elements occur in the 5¢ -flanking region of this gene. A potential TATA basal promoter element occurs at 41 bp upstream from the cap site. Two presumptive helix-loop-helix (bHLH) ...
Date: May 2001
Creator: Kongcharoensuntorn, Wisatre

Maelstrom: the Last Coyote Tale

Description: It is a dark future, where corporations have taken the place of governmental bodies, and Earth is a myth, forgotten in the reconstruction after the Second Dark Age. One man--a clone--investigates a murder [that] leads him deep into a spirit quest of his own that will answer the questions of Man's heritage as well as his own identity. This story is a science fiction, but it is similar in structure to a Coyote tale and involves quite a bit of Navajo mythology. The use of Native American imagery is not an attempt to capitalize on another culture, but rather to study the culture and use allegorical elements that transcend many cultures. It must also be noted that non-Native American writers wrote all texts available on the subject. This fact should be taken into consideration by the reader.
Date: December 1997
Creator: Claiborne, J. Taylor (John Taylor)

A Study of the Anti-Catholic Bias Contained Within Jacob Burckhardt's The Civilization of the Renaissance in Italy

Description: This work examines the anti-Catholic bias of Jacob Burckhardt as he employed it in the Civilization of the Renaissance in Italy. A biographical chapter examines his early education in the Lutheran seminary and the influence of his educators at the University of Berlin. The Civilization is examined in three critical areas: Burckhardt's treatment of the popes in his chapter "The State as a Work of Art," the reform tendencies of the Italian humanists which Burckhardt virtually ignored, and the rise of confraternities in Italy. In each instance, Burckhardt demonstrated a clear bias against the Catholic Church. Further study could reveal if this initial bias was perpetuated through later "Burckhardtian" historians.
Date: May 1996
Creator: Kistner, Michael P. (Michael Patrick)

Personality Correlates of Anorexia Nervosa in a Nonclinical Sample

Description: The purpose of this study was to examine the relationship between anorexia nervosa and several personality traits. Past research in this area has been contradictory for several reasons. Sociocultural theories have described the media's role in promoting eating disorders by portraying a thin body-type as the ideal. However, they have neglected to describe the personality ideal which our society promotes in women. It is proposed here that anorexics incorporate and oppose this ideal. Therefore, the anorexic personality is one filled with conflict.
Date: December 1994
Creator: Rogers, Rebecca L. (Rebecca Lynn)

Training Condom Use Skills for Sexually Active College Students

Description: Eighty-nine single, sexually active, heterosexual college students (ages 17-24) participated in one of two intervention conditions. Experimental groups were taught skills specific to condom use and sexual communication via a multimedia presentation. Control groups viewed a video on an unrelated topic. Individuals in the experimental conditions were expected to show higher levels of self-efficacy, greater knowledge concerning diseases, and improved attitudes about condoms immediately following the intervention. They were also expected to report safer sexual practices at the one month follow-up. Findings reveal that improved attitude and knowledge scores did not translate into behavioral changes.
Date: December 1994
Creator: Smith, Teresa E. (Teresa Elizabeth)

Electron Density and Collision Frequency Studies Using a Resonant Microwave Cavity as a Probe

Description: Electron densities and collision frequencies were obtained on a number of gases in a dc discharge at low pressures (0.70-2mm of Hg). These measurements were performed by microwave probing of a filament of the dc discharge placed coaxially in a resonant cavity operating in a TM₀₁₀ mode. The equipment and techniques for making the microwave measurements employing the resonant cavity are described. One of the main features of this investigation is the technique of differentiating the resonance signal of the loaded cavity in order to make accurate measurements of the resonant frequency and half-power point frequencies.
Date: May 1973
Creator: Freeman, Ronald Harold

The Effect of Giving Class Time for Reading on the Reading Achievement of Fourth Graders and the Effect of Using a Computer-Based Reading Management Program on the Reading Achievement of Fifth Graders

Description: This study investigated the problem that educators have throughout the state of Texas. The problem educators have is that reading scores continue to fall short of state expectations. This study investigated the effectiveness of 90 minutes of class time given for reading to students who use the Electronic Bookshelf Program and the effectiveness of the Electronic Bookshelf Program, which is being sold to school districts throughout the nation. The literature review focused on the effectiveness of independent reading on reading achievement, and the effectiveness of using computer-based reading programs to increase reading achievement.
Date: May 1998
Creator: Peters, Rochelle

Effects of Music on Vividness of Movement Imagery

Description: The purpose of the investigation was to determine the effects of music on self reported vividness of movement imagery. Eighty-four undergraduate kinesiology majors (42 males; 42 females) were subjects. Based on identical perceptions of precategorized music (classical and jazz), selected subjects were randomly assigned to one of three music treatment conditions (sedative, stimulative, and control) and administered the Vividness of Movement Imagery Questionnaire. A 3 x 2 x 2 (Treatment x Gender x Perspective) ANOVA with repeated measures on the last factor was employed. The results revealed that the two music conditions significantly enhanced the vividness of internal and external imagery perspectives when compared to the no music condition, and that music facilitated the vividness of males and females equally.
Date: December 1994
Creator: Tham, Edgar Kok Kuan