UNT Theses and Dissertations - 18,439 Matching Results

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The effects of diphenylhydantoin on the lymphoreticular tissues of the rat

Description: A study was made of the effects of diphenylhydantoin (DPH) and the carrier solution on the spleen, lymph node, and thymus. DPH was injected i.p. at concentrations of 5 and 10 mg./100gm. for 30 and 60 days. Hematologic effects observed were leucocytosis, neutrophilia, eosinophilia, and lymphopenia. Respiratory measurements of lymph node tissue slices were made using the oxygen electrode method.
Date: August 1976
Creator: Gordon, Charles K.
Partner: UNT Libraries

Organizational Rhetoric in the Academy: Junior Faculty Perceptions and Roles

Description: The purpose of this project was to examine the perceptions of junior faculty members as they relate to roles and expectations related to the tenure process. The study utilized a mixed methods approach to gain a multifaceted perspective of this complex process. I employed a quantitative and qualitative survey to explore junior faculty perceptions regarding roles related to promotion and tenure policies. In addition, I conducted fantasy theme analysis (FTA) to explore the organizational rhetoric related to these policies. Findings from the study illustrate the continued presence of the "publish or perish" paradigm, as well as issues related to role conflict within the context of organizational rhetoric.
Date: December 2008
Creator: Gordon, Cynthia K.
Partner: UNT Libraries

Trade negotiations in agriculture: a comparative study of the US & the EC

Description: This study applies Destler's institutional counterweights to Putnam's two-level analysis, substituting Liberal Institutionalism and Realism for internationalism and isolationism, in a comparative case study of the roles played by the United States and the European Economic Community in multilateral trade negotiations in agriculture under the aegis of the General Agreement for Tariffs and Trade during the first half of the Uruguay round.
Date: December 1994
Creator: Gordon, H. William (Harold William)
Partner: UNT Libraries

Employment of the Rorschach Inkblot Test with the Devries Suicide Inventory

Description: This investigation represents an attempt to employ the Devries Suicide Prediction Scale and the Rorschach Inkblot Test in a two-stage predictive model which was designed to decrease the high false positive rate associated with the Devries and to design a way in which the Rorschach could be used efficiently in suicide prediction in a large mental hospital setting. The Rorschach was not found to significantly improve the predictive ability of the Devries. An unexpectedly high percentage of mental patients in the study, thirty-eight percent, admitted to previous suicide attempts, raising the question of whether suicidal behavior is not more common than is usually thought.
Date: May 1976
Creator: Gordon, James L.
Partner: UNT Libraries

Empirical Tests of the Signaling and Monitoring Hypotheses for Initial Public Offerings

Description: The research questions investigated are: 1. Are the expected post-issue fractional holdings of the directors and officers, venture capitalists and institutions signals of firm value? 2. Are the expected post-issue fractional holdings of the directors and officers, venture capitalists and institutions signals of underpricing? and 3. Are the directors and officers, venture capitalists and institutions monitors of IPO investments? The signaling theory developed by Grinblatt and Hwang (1989) (GH) and the monitoring theory for IPO investments have been used to develop the hypotheses for this dissertation. Four factors make my methodology unique. These factors are: 1. I apply and test the GH IPO signaling model over a unique data set collected from the IPO prospectuses, proxy statements and annual reports; 2. I disaggregate the expected post-issue holdings of the different groups of pre-issue blockholders and insiders and hypothesizes that these individual groups represents signals of firm value and underpricing; 3. I hypothesize that these groups, in aggregate and separately, monitor IPO investments over the long term; And 4. I develop signaling and monitoring hypotheses to make predictions at the two stages of the IPO. The results show that firm value is positively related to the level of underpricing, at a given variance of the firms cash flows; the level of underpricing is positively related to the holdings of the directors and officers as a group and the aggregate of the directors and officers, VCs and institutions, at given variances of the firm's cash flows; the firm value is not related to the level of underpricing, at a given level of capital outlay and holdings of either the aggregate blockholders, directors and officers, VCs or institutions. For the monitoring hypotheses, the results show that the long-run buy-and-hold-returns are positively related to the investment bank reputation and the gross spread. Also, the ...
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Date: May 2006
Creator: Gordon, Sean Anthony Garnet
Partner: UNT Libraries

Strategic Reorientation in the Computer Software and Furniture Industries: a Hierarchical Regression Analysis

Description: Insufficient literature exists in the area of incremental and revolutionary change to explain and predict the convergence and reorientation phenomena happening in organizations. The process of strategic reorientation involves the internal organizational complexities of fast-paced (within two years) changes in competitive strategy as a necessary condition coupled with changes in at least two of organization structure, power distribution, and control systems. Antecedent forces believed to influence the discontinuous change process include industry sales turbulence, structural inertia/firm size, firm past financial performance, CEO turnover, top management team turnover, management team heterogeneity, management environmental awareness, and external attributions for negative financial performance. Punctuated equilibrium was the foundational theory for this study in which a strategic reorientation model published in Strategic Management Journal was reconstructed. The research question was: What seem to be the significant time-based antecedent forces or conditions that lead to strategic reorientation? The study used two hierarchical logit regression models to analyze data gathered from COMPUSTAT PC Industrial Data Base and Compact Disclosure (CD-ROM) over the years 1987-1993 from the turbulent computer software and stable furniture industries. Qualitative data were found in 10-K reports and President's Letters in Annual Reports filed with the SEC and available on Laserdisclosure. The sample, exclusive of 3 multivariate outliers, included 74 software firms and 43 furniture firms for a pooled total of 117 firms. When separate industries were analyzed using the first of the Systat logit hierarchical regressions, results showed no statistically significant effects. By contrast, when data were pooled, the second hierarchical logit regression model, which included industry turbulence and firm size, showed these one-tailed statistically significant results: strategic reorientation is positively affected by prior industry turbulence and CEO turnover, but is negatively affected by prior top management team turnover and the interaction between industry turbulence and external attributions for negative financial performance.
Date: August 1995
Creator: Gordon, Shelley S. (Shelley Sampson)
Partner: UNT Libraries

Sex Dimension of the Dogmatism Scale: A Factor Analysis

Description: The problem of this study was to factor-analyze Rokeach's Dogmatism Scale and examine the factor structures of the scale for differences in the solutions obtained for the male and female groups. It was hypothesized that the Dogmatism Scale consists of several discriminable dimensions of the construct dogmatism and that these dimensions differ significantly for males and females. The dogmatism scale was administered to 186 male and 115 female college students. The male and female solutions yielded thirteen and sixteen orthogonal factors, respectively. Six male factors and eleven female factors were unique to their respective sex groups, indicating that the Dogmatism Scale is multidimensional and that significant sex differences are found when these dimensions are examined.
Date: May 1974
Creator: Gordon, William Knox
Partner: UNT Libraries

Influence of parental swimming stamina on the cardiac and metabolic performance of larval zebrafish (Danio rerio).

Description: Superior swimming stamina in adult fish is presumably passed on to their offspring, but the ontogeny of the appearance of superior stamina and the requisite enhanced cardio-respiratory support for locomotion in larval fishes has not been determined. Is the expression of the suite of parental traits enabling superior swimming stamina in their offspring dependent upon their achieving juvenile/adult morphology, or does it appear earlier in their larvae? To answer this, adults were classified into three groups based on swimming stamina, followed by measurement of length, mass, and width. Larval offspring from the two parental groups -high stamina larvae (HSL) and low stamina larvae (LSL)- were reared at 27°C in aerated water (21% O2). Routine and active heart rate, routine and active mass specific oxygen consumption were recorded through 21dpf, and cost of transport (COT) and factorial aerobic scope were derived from oxygen consumption measurements. Routine heart rate at 2dpf of LSL was 164 ± 1 b·min-1, compared to only 125 ± 2 b·min-1 for HSL. Routine heart rate subsequently peaked at 203 ± 1 b·min-1 at 5dpf in the HSL group, compared to 207 ± 1 b·min-1, at 4dpf in the LSP larvae. Active heart rate at 5 dpf of LSL was 218 ± 2 b·min-1 compared to 216 ± 2 b·min-1 for HSL. Active heart rate increased slightly to 227 ± 2 b·min-1 for LSL before decreasing again, while active heart rate remained relatively constant for HSL. Routine O2 consumption at 2dpf of HSL was 0.09 μmol·mg-1·hr-1, compared to 0.03 μmol·mg-1·hr-1 in LSL. Routine O2 consumption subsequently peaked at 0.70 μmol·mg-1·hr-1 at 9dpf in the HSL, compared to 0.71 μmol·mg-1·hr-1, at 9dpf in the LSL. These values dramatically decreased before leveling off at around 0.20 μmol·mg-1·hr-1 and 0.15 μmol·mg-1·h-1, respectively. Active O2 consumption at 5dpf for HSL was 0.38 ...
Date: May 2007
Creator: Gore, Matthew R.
Partner: UNT Libraries

Hobbes’s Deceiving God: the Correspondence Between Thomas Hobbes and Rene Descartes

Description: In presenting their correspondence, I highlight the means in which Hobbes is able to divorce nature and politics in his philosophy. This is done by bringing to light Hobbes’s agreement with Descartes’s deceiving God argument. First, I demonstrate Hobbes’s hidden agreement with it by analyzing his objection to Descartes’s first Meditation. Second, I show that Hobbes and Descartes both retreat into consciousness in order to deal with the possibility of deception on the behalf of God. Third, I trace Hobbes’s rational justification for entertaining that very possibility. Fourth, I bring forward Hobbes’s certain principle, that God is incomprehensible. Fifth, I demonstrate Hobbes’s rationalization for rendering nature incomprehensible in turn. From this key insight, the differences between the two philosophers stand out more. Whereas Descartes rids himself of the possibility of a deceiving God, Hobbes does not. Sixth, I show that Descartes needs to rid himself of that possibility in order to have a basis for science, Hobbes’s science is such that he does not need to rid himself of that possibility. My investigation ends by considering both Hobbes’s and Descartes’s stance on nature, in relation to politics. I find that Hobbes’s principle is much more practical that Descartes’s principle. Hobbes’s principle is shown to be much more instructive and sustainable for human life. In conclusion, this analysis of the origins, principles, and orientation of the two philosopher’s thought brings forward the overarching question, whether the recovery of value and meaning is to be brought about in nature, or in civilization.
Date: August 2015
Creator: Gorescu, Gabriela
Partner: UNT Libraries

Laser Ablation Inductively Coupled Plasma Mass Spectrometry and Raman Spectroscopy Imaging of Biological Tissues

Description: Laser Ablation Inductively coupled plasma mass spectrometry (LA-ICP-MS) and Raman spectroscopy are both powerful imaging techniques. Their applications are numerous and extremely potential in the field of biology. In order to improve upon LA-ICP-MS an in-house built cold cell was developed and its effectiveness studied by imaging Brassica napus seeds. To further apply LA-ICP-MS and Raman imaging to the field of entomology a prong gilled mayfly (Ephemeroptera: Leptophlebiidae) from the Róbalo River, located on Navarino Island in Chile, was studied. Analysis of both samples showcased LA-ICP-MS and Raman spectroscopy as effective instruments for imaging trace elements and larger molecules in biological samples respectively.
Date: May 2016
Creator: Gorishek, Emma
Partner: UNT Libraries

Education for Education's Sake? Exposing the Arts District of Downtown Dallas

Description: This thesis discusses the relatively new approach of art education, by paralleling it to Marxist ideology on art. The Dallas Arts District is one example of a city where museum art education is in conflict: being adopted more vigorously by some and with less acceptance by others. In order to provide a glimpse into the museum ideology of downtown Dallas, previous schools of thought regarding the role of curators and the introduction of educators into museums will be detailed, as well as conflicts between these two factions. The following questions will be addressed: Is museum art education truly a movement which strives to infuse the American culture with a greater appreciation of art? Is there a link to overcoming Marx's key issue of class? How is the movement affecting the Dallas Arts District and to what extent is museum art education being utilized within this forum? Is the emphasis toward museum art education greater in Dallas than in other large cities across the United States, and if so, how has that affected the cities' patrons?
Date: August 2005
Creator: Gormly, Robin K.
Partner: UNT Libraries

Antón Arrufat’s Los Siete Contra Tebas: Political Allegory and Anthropological Concepts As Vehicles to Portray Theatrical and Social Conflict

Description: This thesis (i) presents a critical analysis of the political allegory and dramatic elements employed by Antón Arrufat in Los siete contra Tebas in order to comment upon the conflict in Cuban society during and immediately after the Cuban revolution; and (ii) further analyzes that conflict using an anthropological approach in order to establish partial reintegration as an additional final phase in the rites of passage journey.
Date: August 2014
Creator: Gosch, Elizabeth Anna
Partner: UNT Libraries

Perceptions of Postpartum Depression among Adolescent Mothers and the Social Construction of Related Stigma

Description: Six serial focus groups were used to explore the perceptions of postpartum depression among nine adolescent mothers. The discussions were tape recorded, transcribed and analyzed using symbolic interaction theory, specifically Goffman's concept of stigma. Participants identified major stigma themes in relation to postpartum depression, teenage pregnancy and motherhood, all of which were portrayed negatively in the media. Several key causes of adolescent postpartum depression were also found including self esteem relating to poor body image and social support. The findings indicate a much needed change in the way adolescent mothers are identified and treated for postpartum depression. Additionally, the importance of social support in preventing and treating adolescent postpartum depression is highlighted and programs addressing such concerns must be implemented.
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Date: December 2005
Creator: Gosdin, Melissa M.
Partner: UNT Libraries

Postpartum Depression: A Sociocultural Quantitative and Qualitative Analysis of Adolescent and Adult Hispanic Mothers

Description: This dissertation is a mixed methods analysis investigating postpartum depression as it is experienced by self-reported depressed Mexican American adolescent and adult mothers. The qualitative portion of this study explores pregnancy and motherhood to better understand meanings attached to depression. Six adolescent and six adult mothers, were recruited from the Dallas/Fort-Worth area. Each was interviewed twice, using semi-structured interview guides. The quantitative phase utilizes a national sample of self-reported depressed Hispanic mothers to identify breastfeeding behavior and mothers' perceptions of the physical health of their babies. Specifically, a secondary analysis of the National Survey of Children's Health, 2003 was used to supplement the qualitative data. This study provides a theoretical framework of fragmented identity to explain socio-cultural factors contributing to postpartum depression among Mexican American adolescent and adult mothers. Common themes leading to a fragmented identify were indentified. Contributors to postpartum depression include: unplanned pregnancy, internal struggle between cultures, body image and family conflict. Stigma associated with teen motherhood also contributed to depression among adolescent mothers while the medicalization of childbirth was a contributing factor of depression among the adult mothers. Additionally, the duration of breastfeeding and mothers' perceptions of their babies' physical health were impacted by depression, but breastfeeding initiation was not.
Date: December 2010
Creator: Gosdin, Melissa M.
Partner: UNT Libraries

The Political Theory of Ayn Rand

Description: The problem undertaken in this thesis is a study of Ayn Rand's political theory as presented in her writings. Rand considers herself both a novelist and a philosopher; her writings are not primarily political in nature. Thus, compiling her political philosophy requires an interpretation of her views on all subjects.
Date: December 1971
Creator: Gose, Barbara Baker
Partner: UNT Libraries

Sex Differences in Extreme Response Style

Description: The main objective of this investigation was to study the influence of sex on extreme response style as measured by a semantic differential. The previous studies led to a general hypothesis formulated as follows. Normal males and females differ from each other with regard to their mean extreme response style scores with females having the greater extreme response scores on the semantic differential.
Date: December 1973
Creator: Gossie, Michael
Partner: UNT Libraries

Analysis of Web Services on J2EE Application Servers

Description: The Internet became a standard way of exchanging business data between B2B and B2C applications and with this came the need for providing various services on the web instead of just static text and images. Web services are a new type of services offered via the web that aid in the creation of globally distributed applications. Web services are enhanced e-business applications that are easier to advertise and easier to discover on the Internet because of their flexibility and uniformity. In a real life scenario it is highly difficult to decide which J2EE application server to go for when deploying a enterprise web service. This thesis analyzes the various ways by which web services can be developed & deployed. Underlying protocols and crucial issues like EAI (enterprise application integration), asynchronous messaging, Registry tModel architecture etc have been considered in this research. This paper presents a report by analyzing what various J2EE application servers provide by doing a case study and by developing applications to test functionality.
Date: May 2004
Creator: Gosu, Adarsh Kumar
Partner: UNT Libraries

Fundamental Studies of Copper Corrosion in Interconnect Fabrication Process and Spectroscopic Investigation of Low-k Structures

Description: In the first part of this dissertation, copper bimetallic corrosion and its inhibition in cleaning processes involved in interconnect fabrication is explored. In microelectronics fabrication, post chemical mechanical polishing (CMP) cleaning is required to remove organic contaminants and particles left on copper interconnects after the CMP process. Use of cleaning solutions, however, causes serious reliability issues due to corrosion and recession of the interconnects. In this study, different azole compounds are explored and pyrazole is found out to be a potentially superior Cu corrosion inhibitor, compared to the most widely used benzotriazole (BTA), for tetramethyl ammonium hydroxide (TMAH)-based post CMP cleaning solutions at pH 14. Micropattern corrosion screening results and electrochemical impedance spectroscopy (EIS) revealed that 1 mM Pyrazole in 8 wt% TMAH solution inhibits Cu corrosion more effectively than 10 mM benzotriazole (BTA) under same conditions. Moreover, water contact angle measurement results also showed that Pyrazole-treated Cu surfaces are relatively hydrophilic compared to those treated with BTA/TMAH. X-ray photoelectron spectroscopy (XPS) analysis supports Cu-Pyrazole complex formation on the Cu surface. Overall Cu corrosion rate in TMAH-based highly alkaline post CMP cleaning solution is shown to be considerably reduced to less than 1Å/min by addition of 1 mM Pyrazole. In the second part, a novel technique built in-house called multiple internal Reflection Infrared Spectroscopy (MIR-IR) was explored as a characterization tool for characterization of different low-k structures.In leading edge integrated circuit manufacturing, reduction of RC time delay by incorporation of porous ultra low-k interlayer dielectrics into Cu interconnect nanostructure continues to pose major integration challenges. The main challenge is that porous structure renders interlayer dielectrics mechanically weak, chemically unstable and more susceptible to the RIE plasma etching damages. Besides the challenge of handling weak porous ultra low-k materials, a lack of sensitive metrology to guide systematic development of plasma etching, ...
Date: December 2015
Creator: Goswami, Arindom
Partner: UNT Libraries

A Comparison of Self Concepts Among "Starter" and "Substitute" Female College Athletes in Selected Varsity Sports

Description: The purposes of the study were (1) to determine if differences exist between the self concepts of female intercollegiate starting and substitute athletes and between members of team and individual sports and (2) to determine if a significant relationship exists between coaches' ratings of an athlete and the athletes' self concepts. Subjects were forty-five college women who met the established criteria. The testing instrument was the Tennessee Self Concept Scale. Data were analyzed by the two-way analysis of variance method and the Spearman Rank Order Correlation. Alpha was .05. Conclusions of the investigation were that (1) the self concepts of athletes in basketball, softball, volleyball, tennis, and badminton are not significantly different, and (2) the coaches' ratings of athletes and athletes' self concept ratings are not significantly related.
Date: December 1975
Creator: Gotcher, Judith F.
Partner: UNT Libraries