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 Collection: UNT Theses and Dissertations
A Positive Ion Source

A Positive Ion Source

Date: 1948
Creator: Hannah, Kenneth W.
Description: This paper describes the construction of a positive ion source of the electrodeless discharge type and may be divided into two main topis; (1) the radio frequency oscillator and power amplifier and associated power supply and (2) the ionization chamber.
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The Possibilities of the Use of Visual Aids in Social Studies in the Intermediate Grades in the Denton Public Schools

The Possibilities of the Use of Visual Aids in Social Studies in the Intermediate Grades in the Denton Public Schools

Date: 1949
Creator: Sauls, Olga Borth
Description: The purpose of this study is to determine the possibilities of visual aids as an aid to the learning process in the social studies of the intermediate grades of the Denton public schools, with particular emphasis on the moving picture films and film strips available for use as visual aids in the social studies subjects.
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A Possible Role of Ascorbate in Boron Deficient Radish (Raphanus sativa L. cv. Cherry Belle)

A Possible Role of Ascorbate in Boron Deficient Radish (Raphanus sativa L. cv. Cherry Belle)

Date: August 2001
Creator: Sedlacek, Theresa D.
Description: The most apparent symptom of boron deficiency in higher plants is a cessation of growth. Deficiency causes a reduction in ascorbate concentration and the absorption of nutrient ions. Addition of ascorbate temporarily relieves deficiency symptoms. In boron sufficient plants the addition of ascorbate to media causes an increased uptake of nutrients. In an attempt to discover if ascorbate addition to deficient plants causes increased ion uptake, radish plants were grown hydroponically in four different strengths of boron solution. A colorimetric assay for phosphorus was performed both before and after supplementation. Results, however, were inconclusive.
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Possible uses of North Texas Plants and Animals in Elementary Science

Possible uses of North Texas Plants and Animals in Elementary Science

Date: May 1937
Creator: Millican, Addie
Description: This thesis aimed to study plants and animals of North Texas which are adaptable for use in elementary science. In this study, 15 groups of plants and animals were selected as representative ones and among other benefits, each group of organisms was examined for its contributions to a limited understanding of bilogical principles.
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Post-Civil War Democratization: Domestic and International Factors in Movement Toward and Away from Democracy

Post-Civil War Democratization: Domestic and International Factors in Movement Toward and Away from Democracy

Date: May 2010
Creator: Joshi, Madhav
Description: Post-civil war democratization is a critical element of building sustainable peace in the post-civil war states. At the same time, studies of democratic transition and survival suggest that the post-civil war environment is not hospitable to either the transition to or survival of democracy. The post-civil war environment is contentious. Former protagonists are fearful about their security and at the same time they want to protect their political and economic interests. The central argument of this study is that former rivals can agree to a transition toward democracy to the extent that a stable balance of power exists between the government and rebel groups, a balance that eliminates the sort of security dilemma that would encourage one or both to resume armed conflict. And the balance should ensure access to political power and economic resources. This study identifies factors that contribute to the establishment of such a balance of power between former protagonists and factors that affects its stability. These factors should affect the decision of former protagonists on whether or not they can achieve their political and economic interests if they agree to a transition toward democracy once civil war ends. Factors that are conducive to a transition toward ...
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Post-decision Selectivity in Exposure to Information

Post-decision Selectivity in Exposure to Information

Date: August 1968
Creator: Hubbard, Prevost
Description: The purpose of the present study was to determine if persons who had made a recent decision would be selective in seeking information related to their decisions. Also under consideration were the explanation for any selectivity exhibited, and the explanation for any variance in the degree of selectivity manifested.
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Post-Implementation Evaluation of Enterprise  Resource Planning (ERP) Systems

Post-Implementation Evaluation of Enterprise Resource Planning (ERP) Systems

Date: May 2008
Creator: Madapusi, ArunKumar
Description: The purposes of this dissertation were to define enterprise resource planning (ERP) systems, assess the varying performance benefits flowing from different ERP system implementation statuses, and investigate the impact of critical success factors (CSFs) on the ERP system deployment process. A conceptual model was developed and a survey instrument constructed to gather data for testing the hypothesized model relationships. Data were collected through a cross-sectional field study of Indian production firms considered pioneers in understanding and implementing ERP systems. The sample data were drawn from a target population of 900 firms belonging to the Confederation of Indian Industry (CII). The production firms in the CII member directory represent a well-balanced mix of firms of different sizes, production processes, and industries. The conceptual model was tested using factor analysis, multiple linear regression analysis and univariate Anova. The results indicate that the contributions of different ERP system modules vary with different measures of changes in performance and that a holistic ERP system contributes to performance changes. The results further indicate that the contributions of CSFs vary with different measures of changes in performance and that CSFs and the holistic ERP system influences the success achieved from deployments. Also, firms that emphasize CSFs ...
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The Post-World War II American Policy Toward Germany, Particularly as it Culminated in the Entrance of the Federal Republic of Germany into NATO

The Post-World War II American Policy Toward Germany, Particularly as it Culminated in the Entrance of the Federal Republic of Germany into NATO

Date: January 1965
Creator: Moyer, Emma Louise
Description: The purpose of this thesis is to show first how the policy of the United States toward Germany developed during and after World War II: second, to describe that policy in its relation to the entrance of West Germany into the western European community.
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Postcombat Military Job Satisfaction Among Vietnam Helicopter Aviators

Postcombat Military Job Satisfaction Among Vietnam Helicopter Aviators

Date: December 2005
Creator: Crisp, William A.
Description: This project investigated the relations between recalled job-satisfaction, ability, and task demands in Vietnam era helicopter aviators. It attempted to detect and describe factors present in a dangerous combat environment which may influence some individuals to enjoy and take satisfaction at being exposed to, creating, and participating in the dangerous and life threatening violence involved in helicopter combat. Participants were 30 pilots and crew members retired from the 335th Assault Helicopter Company who were all actively involved in combat in Vietnam from 1968 to 1970. This study found that developing a love of war is correlated with anger during combat. The love of war is not correlated with PTSD processes nor is it correlated with specific personality dimensions. The love of war research is a new area. The questions were used to operationalize the love of war represent a significant limitation. This method of operationalizing the love of war concept does not make fine discriminations has questionable content validity. To facilitate accuracy in discriminating between participants when conducting future research in the area, researchers could benefit from constructing a measure with greater content validity.
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Postpartum Depression: A Sociocultural Quantitative and Qualitative Analysis of Adolescent and Adult Hispanic Mothers

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

Date: December 2010
Creator: Gosdin, Melissa M.
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 ...
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