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Aging Is a Determinant in Anoxia Stress Tolerance in Caenorhabditis Elegans

Description: Oxygen availability is critical for survival for most organisms. The nematode, C. elegans, has been useful for studying genetic regulation of anoxia tolerance due to the oxygen deprivation response mechanisms shared with other metazoans. Studies examining long-term anoxia (72h, LTA) tolerance have only been conducted at adult day 1. To investigate the effect of aging on anoxia tolerance wild-type and mutant strains were exposed to LTA between adult day 1 and day 9. Wild-type isolates and daf-16(mu86) (FOXO transcription factor regulated by insulin-signaling) and aak-2(gt33) (catalytic subunit of AMP-activated protein kinase) strains were anoxia sensitive at day 1 and displayed increased LTA tolerance with aging correlated with reproductive senescence followed by a decline in survivorhsip through day 9. The daf-2(e1370) (insulin receptor homologue of C. elegans), glp-1(e2141) (a lin-12/Notch receptor) and fog-2(q71) (required for spermatogenesis) strains were LTA-tolerant through day 5. I conclude that aging influences LTA-tolerance in a strain- and age-dependent manner. In addition to being LTA-tolerant the daf-2(e1370) and glp-1(e2141) strains have a longevity phenotype that is suppressed by loss of kri-1 or daf-12. While loss of kri-1 did not suppress the LTA-tolerant phenotype of glp-1(e2141) at day 1 the portion of impaired survivors increased at day 3 and by day 5 tolerance was suppressed. Similarly, when exposed to 4 days of anoxia the glp-1(e2141);daf-12(rh41rh611) double mutant had a reduced survivor rate at all ages analyzed compared to glp-1(e2141) controls. To better understand formation of an anoxia-tolerant physiology I exposed adults to one or more 24h bouts. Recurrent bouts increased LTA tolerance in wild-type hermaphrodites in a dose-dependent manner. Bout-treated daf-16(mu86) animals had increased survival rate compared to controls yet maximum survival remained below age-matched wild-type. Anoxia bouts decreased LTA-tolerance in aak-2(gt33) mutants, indicating the requirement for ATP regulation in establishing an LTA-tolerant phenotype. These data support the ...
Date: May 2013
Creator: Goy, Jo M.

A Path Analysis of a Job Burnout Model Among Firefighers

Description: The purpose of this study was to propose an exploratory causal model that examines the influence of several antecedent variables on burnout. The antecedent variables included age, marital status, education, tenure, Type A personality, Jungian types, death anxiety, leadership style, job satisfaction, stress, coping efficacy, and marital satisfaction. The validity of the causal model was tested by using path analysis. Subjects were 100 male firefighters who completed self-report measures of the predictor variables. Instruments included the Jenkins Activity Survey, Myers- Briggs Type Indicator, Collett-Lester Attitudes Toward Death Scale, Leader Behavior Description Questionnaire, Job Descriptive Index, Perceived Job Stress, The Coping Inventory, Dyadic Adjustment Scale, and the Maslach Burnout Inventory. Perceived work stress made the only direct contribution to the variance in burnout. Direct paths were found to stress from job satisfaction, Type A personality, and single marital status. Job satisfaction was directly related to leadership (consideration) and the Jungian Introversion, Feeling, and Perceiving preferences. Direct paths were found to marital satisfaction from death anxiety, leadership (consideration), and leadership (structure). Leadership (consideration) was directly related to structure. From the above results, it can be concluded that perception of stress is an important factor in predicting burnout. Other factors are important contributors to stress and have indirect effects on burnout. Implications for the prevention and treatment of job burnout are discussed.
Date: August 1988
Creator: Goza, Gail R.

Combat Near-Death Experiences: An Exploratory, Mixed-Methods Study

Description: This mixed-methods study’s purpose was a systematic comparison of contents and aftereffects of near-death experiences (NDEs) occurring in a variety of circumstances with those occurring in combat. They completed an online survey: a demographic questionnaire, the Near-Death Experience Scale, the Life Changes Inventory-Revised (LCI-R), and four narrative response items. Survey completers were 68 participants: 20 combat near-death experiencers (cNDErs) and 48 non-NDErs (nNDErs). The 29% of participants who met NDE Scale criterion for an NDE was comparable to NDE incidence findings from previous retrospective studies. For statistical analyses, significance was set at p < .05, and effect size (Cohen’s d) was calculated. Mean total NDE Scale scores were significantly lower for cNDErs than variety-of-circumstance NDErs from one of two comparable studies (t = 5.083, p < .0001, d = -1.26), possibly suggesting cNDEs may have “less depth” than other-variety NDEs. Regarding cNDE aftereffects, absence of previous LCI-R data made comparison impossible. Cronbach’s alpha analysis yielded acceptable reliability on the total scale and seven of nine subscales, a finding that matched Schneeberger’s (2010); however, factor analytic results did not support the hypothesized subscale structure of the LCI-R. Although cNDErs did not score significantly higher than nNDErs on the total scale or subscales after Bonferroni correction, results indicated a possible trend toward greater absolute changes (p = 0.02, d = 0.74) and spirituality (p = 0.02, d = 0.67) with the latter finding substantiated by narrative responses. Informal analysis of narrative responses yielded several themes.
Date: August 2011
Creator: Goza, Tracy H.

A Driver, Vehicle and Road Safety System Using Smartphones

Description: As vehicle manufacturers continue to increase their emphasis on safety with advanced driver assistance systems (ADAS), I propose a ubiquitous device that is able to analyze and advise on safety conditions. Mobile smartphones are increasing in popularity among younger generations with an estimated 64% of 25-34 year olds already using one in their daily lives. with over 10 million car accidents reported in the United States each year, car manufacturers have shifted their focus of a passive approach (airbags) to more active by adding features associated with ADAS (lane departure warnings). However, vehicles manufactured with these sensors are not economically priced while older vehicles might only have passive safety features. Given its accessibility and portability, I target a mobile smartphone as a device to compliment ADAS that can bring a driver assist to any vehicle without regards for any on-vehicle communication system requirements. I use the 3-axis accelerometer of multiple Android based smartphone to record and analyze various safety factors which can influence a driver while operating a vehicle. These influences with respect to the driver, vehicle and road are lane change maneuvers, vehicular comfort and road conditions. Each factor could potentially be hazardous to the health of the driver, neighboring public, and automobile and is therefore analyzed thoroughly achieving 85.60% and 89.89% classification accuracy for identifying road anomalies and lane changes, respectively. Effective use of this data can educate a potentially dangerous driver on how to operate a vehicle safely and efficiently. with real time analysis and auditory alerts of these factors, I hope to increase a driver's overall awareness to maximize safety.
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Date: May 2012
Creator: Gozick, Brandon

Perseverance in Children

Description: The purpose of this study was to measure perseverance time as related to the individual's need for achievement, past success or failure, the difficulty of a task, and the experimenter's instructions regarding its difficulty. The subjects used in this study were twenty-eight children, fifteen males and thirteen females, who ranged in age from eight years, six months to nineteen years and nine months, with the mean chronological age being twelve years and ten months.
Date: August 1969
Creator: Grable, Frances

Practical Robust MIMO OFDM Communication System for High-Speed Mobile Communication

Description: This thesis presents the design of a communication system (PRCS) which improves on all aspects of the current state of the art 4G communication system Long Term Evolution (LTE) including peak to average power ratio (PAPR), data reliability, spectral efficiency and complexity using the most recent state of the art research in the field combined with novel implementations. This research is relevant and important to the field of electrical and communication engineering because it provides benefits to consumers in the form of more reliable data with higher speeds as well as a reduced burden on hardware original equipment manufacturers (OEMs). The results presented herein show up to a 3 dB reduction in PAPR, less than 10-5 bit errors at 7.5 dB signal to noise ratio (SNR) using 4QAM, up to 3 times increased throughput in the uplink mode and 10 times reduced channel coding complexity.
Date: May 2015
Creator: Grabner, Mitchell John James

Shostakovich's Use of Satire in Anti-formalist Rayok with a Focus on the Music of the Character Dt Troikin

Description: In January 1989, a much-rumored work by Dmitri Shostakovich titled Anti-Formalist Rayok received its public premiere. Rayok is a single-act satirical opera/cantata for bass soloist and mixed chorus. Each character represents a prominent Soviet political figure: Joseph Stalin, Andrei Zhdanov, and Dmitri Shepilov. The text of the libretto is either taken directly from actual speeches given by these political figures or follows their idiosyncratic style of public speaking. Rayok often falls victim to criticism for its lack of musical depth, a point of view that could easily lead one to see it as one of Shostakovich's lesser works. The purpose of this document is to examine the political environment of the Soviet Union in the early twentieth century in order to provide context for Shostakovich's Anti-Formalist Rayok and to show how Shostakovich uses satire in this piece. This dissertation document looks at the broader concepts of Formalism and Socialist Realism, traces how Socialist Realism became the established Soviet cultural aesthetic, and examines specific historical events in the 1940s and 1950s that relate to Rayok. Musical examples are taken from the section of the piece centering around D.T. Troikin. These examples demonstrate how Shostakovich uses Socialist Realist clichés in order to satirize the overly bureaucratized state of Soviet musical aesthetics. This leads to the conclusion that Shostakovich created a paradoxical work of art only posing as kitsch, and that he was not only satirizing the political figures presented in disguise but also the entire Soviet Socialist Realist aesthetic.
Date: August 2014
Creator: Grabowski, Gregory

Student and Employer Perceptions of Career Expectations and Goals in Retailing

Description: The purpose was to investigate career expectations and goals of junior and senior fashion merchandising majors at North Texas State University and to compare findings with expectations for trainees of retail employers with executive training programs in the Dallas-Fort Worth Metroplex. The findings indicated that most female students are planning their career goals in business for the next five years. Students are confused as to what employee benefits they might receive at the entry level. College recruitment is an important method of hiring executive trainees. Length of training programs vary from six months to three years. At the time of the study, trainees could expect a beginning salary of nine to ten thousand dollars.
Date: August 1977
Creator: Grace, Marilu

Do Non-Native Grammars Allow Verbs to Raise to Agreement?

Description: The purpose of this thesis is to determine whether the setting of the verb movement parameter in L2 is dependent on agreement acquisition. The Optionality hypothesis (Eubank, 1994) is tested by examining the L2 grammar of Chinese learners of English. To test this hypothesis, the sentence matching procedure originally described in Freedman and Forster (1985) is used. It is found that no current theory truly accounts for the results that are obtained.
Date: December 1995
Creator: Grace, Sabine Thepaut

Optimism, Health Locus of Control, and Quality of Life of Women with Initial versus Recurrent Breast Cancer

Description: Health Locus of Control (HLOC) and other predictors of Quality of Life (QL) were examined for women with an initial versus recurrent breast cancer diagnosis. Twenty-eight women with an initial breast cancer (IBC) diagnoses and twenty-eight women with recurrent breast cancer (RBC) diagnoses were recruited from doctors' offices and cancer support groups. Correlational analyses were used to assess the relationships between variables. No significant differences were found between women with IBC and RBC on Psychological QL. Doctor HLOC and Psychological QL were related for women with RBC (r = .481, p = .01) and marginally so for women with IBC (r = .329, p = .09). A positive correlation was also found between Doctor HLOC and Functional QL for both women with IBC (r = .464, p = .01) and women with RBC (r = .390, p = .04). After controlling for stage of cancer, women with RBC reported higher Functional QL than did women with IBC. Advanced (stages III or IV) versus early (stages I or II) cancer stage related to lower Functional QL, controlling for initial versus recurrent diagnosis (r = -.283, p = .01). A marginally significant relationship was also found for cancer stage, regardless of initial versus recurrent diagnosis, with higher Overall QL for women with early stages of breast cancer (r = -.157, p = .09). No significant differences in Optimism or Overall QL were found between women with IBC versus RBC. No differences were found between married and single women. This research begins to explore differences in Quality of Life for women with a new versus a recurrent breast cancer diagnosis.
Date: May 2001
Creator: Graci, Gina

An Analytical Study of Paradox and Structural Dualism in the Music of Ludwig van Beethoven

Description: Beethoven's rich compositional language evokes unique problems that have fueled scholarly dialogue for many years. My analyses focus on two types of paradoxes as central compositional problems in some of Beethoven's symphonic pieces and piano sonatas. My readings of Beethoven's Piano Sonata No. 27 (Op. 90), Symphony No. 4 (Op. 60), and Symphony No. 8 (Op. 93) explore the nature and significance of paradoxical unresolved six-four chords and their impact on tonal structure. I consider formal-tonal paradoxes in Beethoven's Tempest Sonata (Op. 31, No. 2), Ninth Symphony (Op. 125), and Overture die Weihe des Hauses (Op. 124). Movements that evoke formal-tonal paradoxes retain the structural framework of a paradigmatic interrupted structure, but contain unique voice-leading features that superimpose an undivided structure on top of the "residual" interrupted structure. Carl Schachter's observations about "genuine double meaning" and his arguments about the interplay between design and tonal structure in "Either/Or" establish the foundation for my analytical approach to paradox. Timothy Jackson's reading of Brahms' "Immer leiser word meine Schlummer" (Op. 105, No. 2) and Stephen Slottow's "Von einem Kunstler: Shapes in the Clouds" both clarify the methodology employed here. My interpretation of paradox involves more than just a slight contradiction between two Schenkerian readings; it involves fundamentally opposed readings, that both result from valid, logical lines of analytical reasoning. In my view, paradoxes could be considered a central part of Beethoven's persona and philosophy. Beethoven's romantic endeavors and his relationships with mentors suggest that paradoxes might have been central to his bravura. Furthermore, Beethoven's familiarity with the politics of the French Revolution and Shakespearean literature suggest that paradoxes in some pieces (including the Ninth Symphony) could be metaphorical representations of his ideology. However, I do not attempt to explicitly link specific style features to extra-musical ideas. Modern Schenkerian scholars continue to expand ...
Date: May 2016
Creator: Graf, Benjamin Stewart

Land, Property, and the Chickasaws: The Indian Territory Experience

Description: At a very early date, it must have been apparent to the Chickasaws that their only hope of survival in the face of a steadily encroaching white man's world would be to imitate and emulate the latter's society, his Constitution, and his laws. Long before Andrew Jackson signed the Removal Act destined to uproot large numbers of peoples and result in some of the greatest mass migrations in the history of the United States, the Chickasaws, largely by a process of trial and error, attempted to sow the seeds for their plan of survival in keeping with their realization of this all-important fact. After arriving in the new land soon to be known as Indian Territory, they continued this process in the hope that their identity as a tribe and a Nation might never be lost. The Chickasaw experience in Indian Territory became indicative of a culture confronted with possible extermination by a larger and more powerful culture. Their story illustrates an intense struggle on the part of the Chickasaws to utilize and regulate the land on a tribal basis of ownership in the face of a fast encircling world which favored the concept of individual private property. One of the major problems that concerned the Chickasaws during this crucial period was how to absorb some of the white man's institutions and way of life, and still cling to tradition and remain basically Chickasaw.
Date: August 1968
Creator: Graffham, Beverly Jean Wood

Dually Semimodular Consistent Lattices

Description: A lattice L is said to be dually semimodular if for all elements a and b in L, a ∨ b covers b implies that a covers a ∧ b. L is consistent if for every join-irreducible j and every element x in L, the element x ∨ j is a join-irreducible in the upper interval [x,l]. In this paper, finite dually semimodular consistent lattices are investigated. Examples of these lattices are the lattices of subnormal subgroups of a finite group. In 1954, R. P. Dilworth proved that in a finite modular lattice, the number of elements covering exactly k elements is equal to the number of elements covered by exactly k elements. Here, it is established that if a finite dually semimodular consistent lattice has the same number of join-irreducibles as meet-irreducibles, then it is modular. Hence, a converse of Dilworth's theorem, in the case when k equals 1, is obtained for finite dually semimodular consistent lattices. Several combinatorial results are shown for finite consistent lattices similar to those already established for finite geometric lattices. The reach of an element x in a lattice L is the difference between the rank of x*, the join of x and all the elements covering x, and the rank of x; the maximum reach of all elements in L is the reach of L. Sharp lower bounds for the total number of elements and the number of elements of a given reach in a semimodular consistent lattice given the rank, the reach, and the number of join-irreducibles are found. Extremal lattices attaining these bounds are described. Similar results are then obtained for finite dually semimodular consistent lattices.
Date: May 1988
Creator: Gragg, Karen E. (Karen Elizabeth)

Municipal Incorporation for the Purpose of Liquor Sale; A Case Study of Impact, Texas

Description: This investigation into local government and politics surrounding the liquor question significantly unveils the turmoil within a community over an issue of intense interest, It illustrates how a gap in legislation enabled subversion of incorporation laws and violation of the majority will by a small but determined group. The pressures and tactics used by both opposing interests in this crisis reveal misuse of the law, possible pay-offs, secret meetings of public bodies, and other illicit occurrences. More importantly, it demonstrates the respect well-meaning citizens have for established law and order. Both sides fought hard for their interests and beliefs, but when appeals had been made to the highest authority, and the ultimate decision had been rendered, then all adherents accepted the reality of the situation, and co-exist on increasingly friendly terms.
Date: August 1967
Creator: Graham, Carmen Anita Gillmore

A Comparison of Three Criteria Employed in the Selection of Regression Models Using Simulated and Real Data

Description: Researchers who make predictions from educational data are interested in choosing the best regression model possible. Many criteria have been devised for choosing a full or restricted model, and also for selecting the best subset from an all-possible-subsets regression. The relative practical usefulness of three of the criteria used in selecting a regression model was compared in this study: (a) Mallows' C_p, (b) Amemiya's prediction criterion, and (c) Hagerty and Srinivasan's method involving predictive power. Target correlation matrices with 10,000 cases were simulated so that the matrices had varying degrees of effect sizes. The amount of power for each matrix was calculated after one or two predictors was dropped from the full regression model, for sample sizes ranging from n = 25 to n = 150. Also, the null case, when one predictor was uncorrelated with the other predictors, was considered. In addition, comparisons for regression models selected using C_p and prediction criterion were performed using data from the National Educational Longitudinal Study of 1988.
Date: December 1994
Creator: Graham, D. Scott

A Comparative Study of the Content and Method of Presentation Found in Twenty-Nine Typewriting Textbooks

Description: The twenty-nine typewriting texts which form the basis for this study are a sample of those currently used in the field of typewriting instruction. The purpose of this study is to see how they agree or where they disagree in the material offered and the way in which it is presented.
Date: 1946
Creator: Graham, Doris Patricia