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Evaluation of a Constructed Wetland to Reduce Toxicity from Diazinon at the Pecan Creek Wastewater Treatment Plant, Denton, TX
The City of Denton Pecan Creek Wastewater Treatment Facility has periodically failed effluent toxicity testing. A Toxicity Identification Evaluation has determined that Diazinon in the effluent is contributing to the observed toxicity. Chlorpyrifos is also implicated as a factor. The City of Denton constructed a half acre experimental wetland to remove Diazinon related toxicity. Results from spiking and microcosm experiments indicate that the wetland can reduce the Diazinon.
Date:
May 1996
Creator:
Baerenklau, Amy L. (Amy Lyn)
System:
The UNT Digital Library
A Comparison of Predicted and Actual Trophic Status of Lake Ray Roberts, Texas Based on Chlorophyll A
Two years before impoundment, the trophic status of Lake Ray Roberts was predicted by applying the total phosphorus input into the Organization for Economic Cooperation and Development (OECD) eutrophication model. Predicted mean summer epilimnetic (MSE) chlorophyll a of Elm Fork arm, Isle duBois arm and Main Body were in the eutrophic category of the OECD model. Observed MSE chlorophyll a two years after impoundment of Elm Fork arm, Isle duBois and Main Body had not reached their predicted means and were at the mesotrophic-eutrophic boundary of the OECD model. Six years after impoundment, observed MSE chlorophyll a for Main Body, was closer to its predicted mean and in the eutrophic category of the OECD model. Six years after impoundment, Elm Fork arm was the most productive area of Lake Ray Roberts. Observed means of chlorophyll a, total phosphates, suspended solids and turbidity were often highest in the Elm Fork arm. Wastewater effluent from Gainesville and Valley View, TX, had an impact on productivity in Elm Fork arm.
Date:
May 1999
Creator:
Lytle, Lili Lisa
System:
The UNT Digital Library
Bus Ride to Liberation: a Historical Video Documentary of the Acres Homes Transit Company in Houston, Texas
The Acres Homes Transit Company in Houston, Texas is Texas' first African American owned and operated bus company. Some say it is the first in the South. The company was developed during the height of the civil rights period. It serves as an establishment of economic empowerment during the oppressive civil rights era. The video is a historical visual documentation of the bus company from its beginning to its end. An accompanying written profile describes the research process, the pre-production, production and post-production stages, as well as future proposals for the documentary.
Date:
May 1994
Creator:
Childress, Doris (Doris Elaine)
System:
The UNT Digital Library
AIDS Preventative Behavior Among Taiwanese University Students
This study used the Health Belief Model to examine the predictors of AIDS preventive behavior. The independent variables were the variables of individual perception, modifying factors (psychological variables), and likelihood variables. The respondents, the Taiwanese students of the University of North Texas, were influenced both by Chinese sexuality and Western values in their AIDS-risk behavior. The results revealed that 90% of the respondents were misinformed on the availability of AIDS vaccine. In addition, a majority of the students were either abstaining from sex or practicing monogamy. Using Pearson's correlation coefficient and multiple regression analysis, this study found that the psychological variables rather than cognitive variables significantly influenced the respondents' AIDS preventive behavior. Finally, suggestions were made for future research on AIDS, and for AIDS preventive behavior campaigns.
Date:
May 1997
Creator:
Wang, Ya-Chien
System:
The UNT Digital Library
A Two Semester Life Science Syllabus for Use in Texas Public Schools with Seventh Grade Students
The problem of using a state adopted textbook written to apply to a large body of students with varying interests and needs was overcome by using a detailed syllabus that arranged course content in a meaningful sequence that appealed to student interest. The outlined syllabus prepared a two semester life science curriculum to be used by the teacher to guide lesson planning. Both semesters were divided into three units each. Materials included in the syllabus were given to actual student groups in real classroom settings. Since hands on learning was an important part of classroom instruction, two laboratory sections were included in the appendices to be used with the syllabus.
Date:
May 1995
Creator:
Edwards, Gail G. (Gail Graham)
System:
The UNT Digital Library
"But a Mournful Remedy": Divorce in Two Texas Counties, 1841-1880
Little scholarship has been dedicated to nineteenth-century Texas family life and no published scholarship to date has addressed the more specific topic of divorce. This study attempts to fill that gap in the historiography through a quantitative analysis of 373 divorce actions filed in Washington and Harrison Counties. The findings show a high degree of equity between men and women in court decisions granting divorces, and in property division and custody rulings. Texas women enjoyed a relatively high degree of legal and personal autonomy, which can be attributed, in part, to a property-rights heritage from Spanish civil law.
Date:
May 1999
Creator:
Pruitt, Francelle LeNaee
System:
The UNT Digital Library
The Tarrant County Atlas for Planning: A Geographic Information System for Open Space Design
This project demonstrates the construction of a land planning geographic information system (GIS) for Tarrant County, and explores how the technology could be used to select sites for a county wide open space preservation plan. As Texas' Tarrant County continues to undergo rapid change due to growth and expansion, the need for proactive, resourceful community planning is greater than ever. One crucial issue facing the region is how to preserve open areas that serve the county's citizens' ecological, recreational, cultural and economic needs. In order to assess how much open space is needed and which sites should be considered for special attention, large amounts of varied spatial information must be analyzed. The answer to effectively dealing with such data sets is a geographic information system (GIS) that stores all pertinent data digitally and allows for its manipulation through use of a computer software package. This project demonstrates the construction of a land planning GIS for Tarrant County, and explores how the technology could be used to select sites for a county wide open space preservation plan.
Date:
May 1996
Creator:
Stewart, Mark Pierce
System:
The UNT Digital Library
The Design and Function of the Interior Space of the Morton H. Meyerson Symphony Center of Dallas, 1980-1989
This thesis investigates how the interior of the Morton H. Meyerson Symphony Center of Dallas accommodates the three groups which use the space: the patron, the musicians, and the administration. Following the Draft Brief of 1981 prepared by the Dallas Symphony Association's Concert Hall Building Committee, each area is discussed as to what was actually built and what concerns were met. The primary data were the symphony center and interviews with I.M. Pei, architect; Russell Johnson, acoustician of the concert hall; Charles Young, associate of Pei, Cobb, Freed & Associates, interior architect of the concert hall; Carolyn Miller, Trisha Wilson & Associates, designer of the Green Room, Richard Trimble, designer of the musicians' areas, and Joe Pereira, designer of the Administrative area.
Date:
May 1990
Creator:
McNair, Gay E.
System:
The UNT Digital Library
Test Order Effects on Children's Rorschachs
Thirty-three children from a community sample, ages 5 to 13, were administered the Rorschach Inkblot Test, along with projective Draw-an-Animal and Draw-a-Person tasks and other psychological measures. Subjects were randomly assigned to one of three test order conditions: Draw-an-Animal followed by the Rorschach, Draw-a-Person followed by the Rorschach, and Rorschach before any other projective test. The number of Human and Animal contents in the test records was examined. Analysis showed no significant differences among the three groups for production of the content variables, suggesting that the Rorschach Inkblot Test is relatively robust with respect to test order effects.
Date:
May 1993
Creator:
Coyle, Edward L. (Edward Louis), 1965-
System:
The UNT Digital Library
Improving the Quality of Hotel Banquet Staff Performance: a Case Study in Organizational Behavior Management
The banquet staff at a north Texas hotel were responsible for setting up 11 different functions (e.g., buffet dinners) for conferences and meetings. The functions were often set up late and items were often omitted. An analysis suggested that performance problems were the result of weak antecedents, inefficient work procedures, inadequate training and a lack of motivating consequences. An intervention consisting of task checklists, feedback, goal setting, monetary bonuses, training and job aids was designed to enhance the accuracy and timeliness of function setups. Performance increased from an average of 68.8% on the quality measure (accuracy plus timeliness) in baseline, to 99.7% during the intervention phase. Performance decreased to 82.3% during a follow-up phase in which parts of the intervention were discontinued by hotel management. Performance increased to 99.3% with the reintroduction of the intervention phase.
Date:
May 1994
Creator:
LaFleur, Tobias C. (Tobias Christopher)
System:
The UNT Digital Library
Magical Contagion and AIDS Scale: Development and Validation
A Magical Contagion and AIDS Scale was developed to address problems with existing Contagion and AIDS measures. Magical Contagion is an influence that exists after contact is terminated. It is comprised of Permanence, Holographic Effects, Moral Germ Conflation and Backward Action. Data from 280 undergraduates revealed low mean levels of Magical Contagion and AIDS. Contagion effects did not differ on demographic variables. Content validity, criterion-related validity, discriminate validity, and internal consistency were evaluated. Significant correlations were found between the Contagion Scale and Merging/Separation and Homophobia Scales. Negative correlations were found between the Contagion scale and the AIDS knowledge and social desirability scales. Alpha reliabilities were high (a > .93) for the Contagion scale and subscales. Factor analysis suggested the existence of a single factor and mixed support for three factors.
Date:
May 1994
Creator:
Oizumi, Joelle J. (Joelle Julienne)
System:
The UNT Digital Library
Organochlorine Pesticides and Heavy Metals in Fish From the Trinity River, Texas
The Trinity River passes through the Dallas-Fort Worth metroplex receiving point and non-point source contaminant loadings. Lepomis spp. were collected at twelve sampling locations in the Trinity River in August 1987 and September 1988 and analyzed for organochlorine pesticides and heavy metals. Results from the study were compared to existing U.S. FDA action and tolerance levels, LC50s, and historical data. Various longitudinal trends and some concentration patterns were observed. Continual study of pesticide and metal body burdens in fish allow testing for trends, and thereby, lead to a better understanding of the distribution of contaminants in the Trinity River.
Date:
May 1990
Creator:
Martinez, Maria L., 1960-
System:
The UNT Digital Library
Atmospheric Visibility Assessment for Urban Areas Using Photographic Slides and Optical Densitometry
The factors involved in calculating Standard Visual Range (SVR) are discussed, and a comparison is made between the visibility reported by airport observers and the photographic slide/ optical densitometer method of calculating SVR. Using slides of Houston, Texas, from the fall and winter of 1988-89, it was found that the altitude at which the contrast measurements are made significantly affects the SVR. Also an index for predicting high and low humidity was developed using the blue/red ratio of the log exposure of the sky, and sun/shade target condition.
Date:
May 1992
Creator:
Jacob, Mary Katherine
System:
The UNT Digital Library
Perceptions of Self-Disclosure in Interpersonal Compliance-Gaining
One hundred thirty-five undergraduate students were queried at North Texas State University. Perceptions of self-disclosure as a compliance-gaining tactic were surveyed. A fifteen item questionnaire was utilized. Fourteen questions were tested by an analysis of variance. One question was tested by chi-square. Data indicated that self-disclosure was viewed as an effective compliance-gaining tactic for both males and females; but females were perceived as more effective than males utilizing the tactic. Self-disclosure utilized as a compliance-gaining tactic was perceived as appropriate by both males and females. Results indicated females and males have similar perceptions regarding the appropriateness of utilizing the self-disclosure tactic. Male and female raters did not differ significantly from each other.
Date:
May 1988
Creator:
Vande Zande, Ann R. (Ann Rachel)
System:
The UNT Digital Library
On Viewing Press Releases of the Texas State AFL-CIO as Rhetorical Genre
Previous scholarship on labor rhetoric has concentrated on the impact of declining union membership and contemporary activist strategies on the part of unions. The press release is a common form of communication that organized labor employs in order to reach its publics. This study explores the press releases of the Texas State AFL-CIO to determine to what extent this level of labor discourse meets the criteria of a rhetorical genre. This study employs the methodology for generic criticism laid out by Foss for identifying genres. The study concludes that a genre of labor rhetoric exists and that the genre was used extensively to promote the Texas State AFL-CIO as a socially-conscious and politically motivated organization.
Date:
May 1992
Creator:
Welborn, Ronny D.
System:
The UNT Digital Library
Discursive Horizons of Human Identity and Wilderness in Postmodern Environmental Ethics: A Case Study of the Guadalupe Mountains of Texas
Using a genealogy of the narratives of the Guadalupes, I explore three moral identities. The Mescalero Apache exist as caretakers of sacred space. Spanish and Anglo settlers exist as conquerors of a hostile land. The park service exists as captives, imprisoned in the belief that economic justifications can protect the intrinsic value of wilderness. The narrative shift from oral to abstract text-based culture entails a shift from intrinsic to instrumental valuation. I conclude that interpretation of narratives, such as those of the Guadalupes, is not by itself a sufficient condition for change. Interpretation is, however, a necessary condition for expanding the cultural conversation beyond merely instrumental justifications to include caring for wilderness's intrinsic values.
Date:
May 1993
Creator:
Hood, Robert L. (Robert Leroy)
System:
The UNT Digital Library
Production Trends in the Utilization of Commercial Multi-Image Presentations Produced in Dallas During the High Growth Years 1979-1981
This study was designed to determine the general volume of multi-image production in Dallas County, Texas from 1979 through 1981 as categorized by: the presentation, number of projectors utilized, and by relevant aspects of presentation with analysis of 85 respondents. The questionnaire yielded 633 variables in the computer analysis. The study revealed significant growth in multi-image production with the 1981 total being more than twice the 1979 total. 1988 consensus indicates that the multi-image use is dictated by the business climate. Having been adopted initially, it is retained by those who find it effective and a suitable medium for larger screens.
Date:
May 1989
Creator:
McCracken, Bruce (Bruce Edward)
System:
The UNT Digital Library
Lincoln-Douglas Debate in the State of Texas
This study traces the development of Lincoln-Douglas debate in Texas. The history of this type of debate from the Great Debate between Abraham Lincoln and Stephen Douglas to the Reagan-Mondale debates is considered. In addition, the merits of this type of oral controversy are explored. The reasons for the creation of L-D debate and its introduction into the forensic curriculum are discussed. In order to measure L-D's growing acceptance in the debate community, the results of a questionnaire of Texas Forensic Association debate coaches is evaluated. This study found that L-D debate is growing in participation in Texas schools. The distinct features of L-D enable it to be an innovative and challenging form of discourse.
Date:
May 1986
Creator:
Baxter, Laura B. (Laura Beth)
System:
The UNT Digital Library
Dallas Barrio Women of Power
This thesis discusses Mexican immigration into Texas, and the communities in which the immigrants settled. The focus is on Dallas, with particular emphasis placed upon the women of Little Mexico, a specific barrio there. Sources include interviews with the subjects and their descendants, newspaper articles, journals, unpublished theses about Little Mexico, and books.
Date:
May 1992
Creator:
Guzman, Jane Bock
System:
The UNT Digital Library
Variables Affecting Grandchildren's Perceptions of Grandparents
While many studies have investigated grandparenthood from the point of view of the grandparent, few have considered this issue from the perspective of the grandchild. In this respect, a number of variables (i.e., grandchild age and gender, parents' marital status, and grandparents' age, gender, education, kinship position, residential proximity to and frequency of visiting with grandchildren, perceived influence on the grandchild, style of grandparenting, and relationship with the parents) were investigated as determinants of the quality of the grandparent-grandchild relationship in a sample of 171 adolescents and young adults. It was found that different sets of variables operated for different grandparents to predict the quality of their relationships with grandchildren.
Date:
May 1988
Creator:
Shore, R. Jerald (Robert Jerald)
System:
The UNT Digital Library
Assessing Defensiveness with the PAI: a Cross Validational Study
The use of scales on the Personality Assessment Inventory (PAI) to detect defensiveness in criminal and nonclinical samples was evaluated. Forty-five male inmates of a county jail and 38 male undergraduate psychology students were provided with incentives to complete the PAI under two conditions: standard instructions and experimental instructions to feign a specific, positive role. The sequence of instructions was counterbalanced in both samples for the purpose of examining ordering effects. A repeated measures multivariate analysis of variance (MANOVA) was performed, yielding significant main effects of condition, group and order. Additionally, a step-wise discriminant function analysis significantly predicted group membership (i.e., subjects under honest and faking conditions) with a hit rate = 84.4%. Finally, a more effective cutting score for the Positive Impression scale was recommended.
Date:
May 1994
Creator:
Cashel, Mary Louise
System:
The UNT Digital Library
A Survey of the Twentieth Century American Trends in Secondary Mathematics Education
This investigation of twentieth century trends in mathematics education includes the survey of existing literature and questionnaires conducted with retired and active Texas teachers. Historical events, trends in curriculum, instruction, learning theories, and contradictions of twenty-year periods are delineated. Questionnaire responses are tabulated along the same periods and vignettes of typical classrooms are drawn from the data. Results of the survey show the impact of societal forces on mathematics curricula, a continued downward expansion of content into lower grades and expanding knowledge of learning processes. A unified mathematics curriculum, classroom-related learning theory research, and further development of team-teaching are postulated as future trends. Recommendations include further examination of trends through isolation of other variables such as region and ethnicity.
Date:
May 1980
Creator:
Maloney, Letty Lynn
System:
The UNT Digital Library
A Study of the Public Relations Structures and Activities at Selected Dallas Hotels
The study was designed to identify the public relations structures at eight Dallas hotels, their functions and activities, and if public relations effectiveness is evaluated. Findings were based on sixteen interviews with senior management and public relations coordinators. The study concluded that public relations programs are structured by either separate public relations department, public relations activities combined with other department, or an external agency. The public relations functions range from image-building to participation in sales and marketing with primary responsibility of promotion and publicity dominated by economic considerations. One weakness is the lack of formal research methods to discern public opinion. There is a lack of understanding by hotel management of the potential and scope of public relations programs.
Date:
May 1981
Creator:
Milacek, Barbara J.
System:
The UNT Digital Library
A Study of the Status of Cooperative Relationships Between the YMCA and Municipal Recreation in the State of Texas
This study investigated the perceptions of administrators of the YMCA and municipal recreation departments in the state of Texas concerning their cooperative relationship in the use of areas and facilities, personnel management, and program planning. A questionnaire was used to obtain their perceptions. Of the 140 questionnaires mailed, ninety-two were returned that were able to be utilized in the study. Their responses were analyzed using the Chi-Square test. The findings revealed a general agreement concerning the lack of cooperation between them. This wat evidenced in that they "never" or "seldom" communicated, consulted with the other, initiated joint sponsorship of programs, or cooperated in the three specified areas of recreational programming.
Date:
May 1978
Creator:
Nichols, Lawrence D.
System:
The UNT Digital Library