Underwater Optical Properties of Lake Texoma (Oklahoma-Texas) Using Secchi Disk, Submarine Photometer, and High-Resolution Spectroscopy (open access)

Underwater Optical Properties of Lake Texoma (Oklahoma-Texas) Using Secchi Disk, Submarine Photometer, and High-Resolution Spectroscopy

The underwater optical climate of Lake Texoma was measured at eleven fixed stations from August 1996 to August 1997. Secchi transparency and submarine photometry characterized seasonal and spatial values of secchi depth (SD), vertical attenuation coefficient (η''), and depth of euphotic zone (Zeu). Indices of Zeu:SD and η'' × SD were compared with universally applied values derived from inland and coastal waters. Turbidity explained 76% of the variation (p = 0.0001) of η'' among water quality parameters, including chlorophyll-α. Using a spectroradiometer, spectral signatures of chlorophyll-α and turbidity were located. Stations with low turbidity exhibited a distinct green reflectance peak around 590-610 nanometers, indicating presence of chlorophyll-α. Stations with high turbidity exhibited a reflectance peak shift towards the red spectrum, making it difficult to detect the chlorophyll signature. Derivative analysis of the reflectance signal at 590-610, and 720-780 nanometers allowed discrimination of this chlorophyll signature from those of turbidity (0.66 ≤ r^2 ≤ 0.99).
Date: August 1998
Creator: Rolbiecki, David A. (David Alan)
System: The UNT Digital Library
Characteristics of Development Directors in Charitable Homes for the Aged (open access)

Characteristics of Development Directors in Charitable Homes for the Aged

This study concerns the characteristics of fund development directors employed in selected homes for the aged. The first purpose of this study is to develop a profile of job functions, through task analysis, among development directors in charitable homes for the aged. The second purpose of this study is to develop a profile of personal characteristics of development directors of charitable homes for the aged based on the following characteristics: age, sex, educational background, experience outside development, membership in community organizations and amount of specific training in fund development. One instrument was used to gather data for the study. It was distributed to a population of 29 development directors in charitable homes for the aged in Arkansas, Louisiana, Oklahoma, New Mexico, and Texas. This population was predetermined by an initial survey form sent to 193 chief executive officers in the five states mentioned above. Twenty-nine reported formalized programs employing a full-time person with at least a part-time involvement in fund development activities. Of the twenty-nine development directors surveyed, fifteen usable instruments were received (52 percent). A program was used for the survey that included crosstabulation of social characteristics, success in fund raising, length of time in position and educational preparation. …
Date: May 1988
Creator: Wuenschel, Douglas F. (Douglas Ferdinand)
System: The UNT Digital Library
Job Performance Expectations of Recent Journalism Graduates and the Importance of Journalism Education (open access)

Job Performance Expectations of Recent Journalism Graduates and the Importance of Journalism Education

The purpose of this study was to identify and compare the job performance expectations of recent journalism graduates as perceived by selected managing editors and journalism educators in Standard Federal Region Six (the states of Arkansas, Louisiana, New Mexico, Oklahoma, and Texas). The survey instrument consisted primarily of statements dealing with the topics of five research questions on the value of journalism education to success on newspapers, the value of newspaper experience to teaching journalism, the language skills of recent graduates, the value of academic research to the improvement of newspapers, and the "gap" between journalism education and journalism practice.
Date: December 1980
Creator: Flynn, George A.
System: The UNT Digital Library
A Psychological Investigation of the Expressed Attitudes of Single Undergraduate College Students Toward Marriage and Family Life (open access)

A Psychological Investigation of the Expressed Attitudes of Single Undergraduate College Students Toward Marriage and Family Life

This study examined the attitudes of undergraduate college students toward marriage and family life. The students in the study lived in college residence halls located in the states of Arkansas, Louisiana, Oklahoma, and Texas in the southwestern portion of the United States. A survey instrument consisting of fifty-eight attitude statements and six demographic items was used to gather information for the study. All of the fifty-eight attitude statements were listed in the following ten cluster areas for easier accessibility: cohabitation and premarital sexual relations, marriage and divorce, childhood and child rearing, division of household labor and professional employment, marital and extramarital sexual relations, privacy rights and social needs, religious needs, communication expectations, parental relationships, and professional counseling services. The six demographic items included age, gender, ethnic background, year in school, parental status, and dating experience .
Date: August 1981
Creator: Martin, Don (Donald Vincent)
System: The UNT Digital Library
Admission Factors Related to Success in Doctoral Programs in Vocational-Technical Education in Texas and Oklahoma (open access)

Admission Factors Related to Success in Doctoral Programs in Vocational-Technical Education in Texas and Oklahoma

This study identified the admissions criteria for selected doctoral programs in vocational-technical education in Oklahoma and Texas and investigated the relationship of these criteria to success in the doctoral programs. Success in the doctoral programs was identified in terms of cumulative doctoral grade point average. Data were obtained through a questionnaire designed to ©licit both general information concerning admissions criteria for vocational-technical doctoral programs at the selected institutions and to collect specific information on a random sample of twenty doctoral candidates from each of the four selected institutions. Factors considered included birthdates, gender, scores on admissions tests, grade point average in the masters program, the year the latest masters was completed, number of colleges attended, and cumulative doctoral grade point average. A statistical analysis using nine separate one-way analyses of variance determined that four of the nine factors considered proved to be statistically significant at the .05 level or better when correlated with the criterion variable (cumulative doctoral grade point average). Those factors were gender, Graduate Record Examination verbal and composite scores, and masters grade point average. The results of the study basically parallel findings of research concerning admissions criteria and success in graduate programs in other areas. Additional research …
Date: August 1989
Creator: Roberts, Ross O'Neal
System: The UNT Digital Library
An Investigation of the Importance of the Art of Hand Lettering in the Field of Advertising Art (open access)

An Investigation of the Importance of the Art of Hand Lettering in the Field of Advertising Art

This thesis concerns the utility of including the art of hand lettering in a curriculum of a university advertising art program. Data secured from 155 questionnaires sent to 266 advertising firms in five states were analyzed by simple descriptive statistics including frequency counts and percentages. Two hypotheses were examined, and it is concluded that hand lettering is still needed in advertising art and should be taught in university art programs.
Date: August 1977
Creator: Greer, Hiram V.
System: The UNT Digital Library
Environmental Factors Influencing Chlorophyll-a Concentrations in Lake Texoma (open access)

Environmental Factors Influencing Chlorophyll-a Concentrations in Lake Texoma

An analysis of algal biomass measured by chlorophyll-a concentration in Lake Texoma was performed as a part of a monitoring program to develop baseline environmental data in order to detect the potential effects of engineered changes in chloride concentrations in the reservoir. This portion of the research project focused on two main research objectives. The first objective was evaluating the effect of sampling strategy on the ability to adequately reflect standing crop estimates and trends in algal biomass. Two sampling regimes utilizing replication of three versus ten samples were applied and then analyzed using a minimum detectable difference algorithm to determine the necessary magnitude of replication to represent the variation in the metric. Chlorophyll-a distribution was analyzed for zonation patterns expected in a river-run reservoir to establish the importance of representative sampling of river, transition and main lake zones of the reservoir for management decisions and trophic characterization.
Date: December 1998
Creator: Gibbs, Jennifer S. (Jennifer Sokolovic)
System: The UNT Digital Library
Biodiversity of Dragonflies and Damselflies (Odonata) of the South-Central Nearctic and Adjacent Neotropical Biotic Provinces (open access)

Biodiversity of Dragonflies and Damselflies (Odonata) of the South-Central Nearctic and Adjacent Neotropical Biotic Provinces

The south-central United States serves as an important biogeographical link and dispersal corridor between Nearctic and Neotropical elements of western hemisphere odonate faunas. Its species are reasonably well known because of substantial collections, but there has been no concerted effort to document the extent of biodiversity and possible geographic affinities of dragonflies and damselflies of this region. The recent discoveries of Argia leonorae Garrison, Gomphus gonzalezi Dunkle and Erpetogomphus heterodon Garrison from southern and western Texas and northern Mexico suggest that Odonata species remain to be discovered in this area, particularly from far south Texas and northern Mexico. I have documented a total of 12,515 records of Odonata found in 408 counties within the south-central U.S. A total of 73 species of damselflies and 160 species of dragonflies was revealed in the region. The 233 (197 in Texas) Odonata species are distributed among 10 families and 66 genera. Illustrated family, generic, and species-level keys are provided. Since the beginning of this work in the Fall of 1993, one species has been added each to the Louisiana and Oklahoma faunas, and 12 species have been added, previously unreported from Texas, including four new to the U.S. The area of highest Odonata …
Date: May 1999
Creator: Abbott, John C.
System: The UNT Digital Library
Size Fractionation of Metabolically Active Phytoplankton and Bacteria in Two Diverse Lentic Systems (open access)

Size Fractionation of Metabolically Active Phytoplankton and Bacteria in Two Diverse Lentic Systems

Simultaneous size fractionation of plankton populations associated with NaH^14CO_3 and ^3H-glucose uptake was employed in eutrophic Lake Texoma (Texas and Oklahoma) and oligotrophic Flathead Lake (Montana). Autoradiography was utilized to determine the role of specific microorganisms in community metabolism. Ultraplankton (0.45-10 μm) dominated plankton numbers and metabolic activity in both aquatic systems. Many of the most abundant species were not the most productive, in terms of inorganic C fixation. Rates of heterotrophic uptake of ^3H-glucose were small in comparison to photolithotrophic uptake in both lakes, Photoheterotrophy was more extensive in Flathead Lake, Autoradiographs indicated that bacteria were responsible for observed photoheterotrophy. Oscillatoria sp. exhibited. mixotrophy in Lake Texoma,
Date: August 1980
Creator: Ellis, Bonnie K.
System: The UNT Digital Library
Seasonal and Spatial Variability of the Microcrustacean Community in Lake Texoma, Texas and Oklahoma (open access)

Seasonal and Spatial Variability of the Microcrustacean Community in Lake Texoma, Texas and Oklahoma

Twenty-eight species of zooplankton were identified from Lake Texoma. Seasonal density of the overall microcrustacean community and seasonal cycles of individual species were compared with northern populations and any available literature from the Southwest. Cycles of occurrence and abundance were similar to those observed in northern populations but tended to occur earlier in the year due to higher temperatures. Spatial distributions within the reservoir were heavily influenced by nutrient and salt input from the Red River, which resulted in dense populations in the Red River Arm. In addition, during the summer, the microcrustacean community was restricted to the epilimnion due to anoxic conditions in the hypolimnion of the reservoir.
Date: August 1980
Creator: Crist, Lawrence W.
System: The UNT Digital Library
Disposition of Disputed Cases, Involving Non-Basic Wage, Union Security, and Non-Wage Issues of the Oil Refining Industry by the Eighth Regional War Labor Board (open access)

Disposition of Disputed Cases, Involving Non-Basic Wage, Union Security, and Non-Wage Issues of the Oil Refining Industry by the Eighth Regional War Labor Board

This investigation is a study of the issues involved in the disputed cases pertaining to the Oil Refining Industry which were certified to the Eighth Regional War Labor Board serving Texas, Oklahoma, and Louisiana during World War II.
Date: 1947
Creator: Grubbs, Kenneth R.
System: The UNT Digital Library
Developing a Forest Gap Model to Be Applied to a Watershed-scaled Landscape in the Cross Timbers Ecoregion Using a Topographic Wetness Index (open access)

Developing a Forest Gap Model to Be Applied to a Watershed-scaled Landscape in the Cross Timbers Ecoregion Using a Topographic Wetness Index

A method was developed for extending a fine-scaled forest gap model to a watershed-scaled landscape, using the Eastern Cross Timbers ecoregion as a case study for the method. A topographic wetness index calculated from digital elevation data was used as a measure of hydrologic across the modeled landscape, and the gap model modified to have with a topographically-based hydrologic input parameter. The model was parameterized by terrain type units that were defined using combinations of USDA soil series and classes of the topographic wetness index. A number of issues regarding the sources, grid resolutions, and processing methods of the digital elevation data are addressed in this application of the topographic wetness index. Three different grid sizes, 5, 10, and 29 meter, from both LiDAR-derived and contour-derived elevation grids were used, and the grids were processed using both single-directional flow algorithm and bi-directional flow algorithm. The result of these different grids were compared and analyzed in context of their application in defining terrain types for the forest gap model. Refinements were made in the timescale of gap model’s weather model, converting it into a daily weather generator, in order to incorporate the effects of the new topographic/hydrologic input parameter. The precipitation …
Date: August 2014
Creator: Goetz, Heinrich (Heinrich Erwin)
System: The UNT Digital Library
A Study of Grievance Procedure in Labor-Management Relations as it Operates within the Eighth Regional War Labor Board (open access)

A Study of Grievance Procedure in Labor-Management Relations as it Operates within the Eighth Regional War Labor Board

This investigation is a study of grievance machinery in industrial relations, as it operates within the Eighth Regional War Labor Board, which serves the states of Texas, Oklahoma, and Louisiana. By grievance machinery is meant the formal procedure through which the worker or his representative must proceed in order to get a grievance or complaint about working conditions, wages, or other items, heard and settled.
Date: 1945
Creator: Martin, Marie G.
System: The UNT Digital Library
A Study of the Training Received and Duties Performed by the Maintenance Employees in a Selected Group of Acme Brick Company Plants (open access)

A Study of the Training Received and Duties Performed by the Maintenance Employees in a Selected Group of Acme Brick Company Plants

The major purposes of this study were (1) to obtain information relating to the number and types of areas of work included in the routine duties performed by the maintenance employees employed in a selected group of Acme Brick Company production plants, (2) to determine the nature of any training that may have assisted in the development of their ability to perform the skills normally involved in each area of work, and (3) to recommend to Acme Brick Company areas of instruction to be included in a training program for its employees.
Date: January 1968
Creator: Hickman, Cleo F.
System: The UNT Digital Library
Geographic Variation in Chromosomes and Morphology of Peromyscus Maniculatus in Texas and Oklahoma (open access)

Geographic Variation in Chromosomes and Morphology of Peromyscus Maniculatus in Texas and Oklahoma

This study was initiated after finding two chromosomal types of Peromyscus maniculatus north and south of the Red River in Texas and Oklahoma. The problem was to explain the chromosomal variations and their implications to the systematics of the grassland subspecies of P. maniculatus in this region.
Date: August 1972
Creator: Caire, William, 1946-
System: The UNT Digital Library
The Relationship between Identifiable Attributes and Decision-Making Ability of Purchasing Personnel as Measured by the Results of a Management Game (open access)

The Relationship between Identifiable Attributes and Decision-Making Ability of Purchasing Personnel as Measured by the Results of a Management Game

This study investigated the relationship between certain biographical and personality characteristics and decision-making ability of purchasing personnel as measured by the results achieved in a complex management game.
Date: May 1973
Creator: Ellis, Norman Dean, 1933-
System: The UNT Digital Library
The Relationship Between Dogmatism and Neuroticism in Supervisors of Sheltered Workshops and Changes in the Self-Concept of Handicapped Employees (open access)

The Relationship Between Dogmatism and Neuroticism in Supervisors of Sheltered Workshops and Changes in the Self-Concept of Handicapped Employees

The problem with which this investigation is concerned is whether or not dogmatism and neuroticism in supervisors of sheltered workshops is related to changes in the self-concept of handicapped employees. The measurements of dogmatism and neuroticism were accomplished through the use of Rokeach's Dogmatism Scale, (form E) and Winne's Neuroticism Scale. Pitt's Tennessee Self Concept Scale was used to measure the self-concept of the handicapped employees.
Date: December 1971
Creator: Whatley, Arthur Allen
System: The UNT Digital Library
Teaching of Educational Administration Theory in Selected Southwestern Colleges and Universities (open access)

Teaching of Educational Administration Theory in Selected Southwestern Colleges and Universities

The problem of this study was an analysis of the processes and materials used in teaching theories of educational administration in certain courses in selected southwestern colleges and universities.
Date: January 1966
Creator: Sullivan, John Benjamin
System: The UNT Digital Library
The Role of College and University Athletic Trainers in Texas and Bordering States (open access)

The Role of College and University Athletic Trainers in Texas and Bordering States

The problem of this study was to compare the existing role of college and university athletic trainers in Texas and bordering states with the role of college and university athletic trainers, (1) as recommended by national athletic training specialists and (2) as recommended by college and university athletic directors in Texas and bordering states.
Date: January 1969
Creator: Patton, Robert Edward
System: The UNT Digital Library
An Economic Evaluation of the Development of the Trinity River Basin as Compared with the Tennessee Valley Authority (open access)

An Economic Evaluation of the Development of the Trinity River Basin as Compared with the Tennessee Valley Authority

"The Tennessee Valley Authority is a world example of the full development of a river basin in soil conservation, flood control, navigation, electric power, afforestation, and recreation... Many river basin areas in the United States have created planning commissions to further develop the advancement of their own watershed problems. The Trinity Improvement Association is the planning commission for the Trinity River watershed area... In Chapter II a factual resume of the Tennessee Valley Authority will be given, and this chapter will be used as a basis of comparison for the development of the Trinity River Basin. Chapter III covers the problem of soil conservation and flood control within the watershed area; Chapter IV deals with the industrial and municipal use of water and the resources of the tributary area; Chapter V contains a brief history of the canal movement on the Trinity, the feasibility of such a canal, and miscellaneous developments; and Chapter VI contains the conclusions that it seems appropriate to draw. " -- leaf 1.
Date: June 1950
Creator: Moore, Fred DeArmond
System: The UNT Digital Library
The Importance of Red River in the History of the Southwest (open access)

The Importance of Red River in the History of the Southwest

For four hundred years the Red River Valley has been the battleground between contending Indian tribes and European races, and for almost three hundred of these years the river has been a disputed boundary line, either between rival nations, or between neighboring states of our country. The river has never been of much importance as a commercial route, yet very few rivers in all the United States have played so an important and persistent a part in this history of their sections as the Red River has played in the history of the Southwest.
Date: August 1940
Creator: Rains, Cleo
System: The UNT Digital Library
Restoration and Extension of Federal Forts in the Southwest from 1865 to 1885 (open access)

Restoration and Extension of Federal Forts in the Southwest from 1865 to 1885

This thesis is an attempt to portray the part the forts of the Southwest had in developing the Federal Indian Policy in that region from 1865 to 1885.
Date: August 1941
Creator: Bennett, Alice Bell
System: The UNT Digital Library
Immunity for New Mexico Public School Districts and the 1978 Tort Claims Act (open access)

Immunity for New Mexico Public School Districts and the 1978 Tort Claims Act

In a 3-year timeframe, nearly 800 student negligence suits were filed, and most involved some claim of personal injury. Despite heightened public attention of negligence lawsuits against school districts and their employees, an empirical study of court decisions revealed that the volume of litigation against school districts remained steady from 1990 to 2005, the majority of cases were ruled in favor of the school district employees, and government and official immunity were most often the basis for these rulings. Researchers have concluded that immunity laws are strong in the United States, although they vary by state in their application. However, a primary recommendation was that, because of the misconception of a lack of immunity for public school employees, a comprehensive study on governmental and official immunity is needed. This dissertation employed legal research, analysis, and methodology to engage in a comprehensive investigation of teacher immunity in the four southern states of Texas, Oklahoma, Mississippi, and New Mexico. Of central concern to this dissertation was the Tort Claims Act of 1978 from the State of New Mexico. The Tort Claims Act is the vehicle by which immunity is granted to public school employees. Court findings over the last 35 years point …
Date: August 2014
Creator: Herauf, Todd J.
System: The UNT Digital Library
Pelagic Phytoplankton and Physicochemical Correlates for Lake Texoma (open access)

Pelagic Phytoplankton and Physicochemical Correlates for Lake Texoma

An analysis and correlation of phytoplankton communities with physicochemical data from 3 sites in Lake Texoma was conducted to supplement time-series data. Water and phytoplankton were sampled monthly, March, 1976-February, 1977. Simple correlations were run between all physicochemical parameters and phytoplankton standing crop from the 3 sites. Multiple linear regression analyses were used to develop equations predictive of phytoplankton standing crop and chloride concentration. Minerals leached from marine sediments in the Red River chennel contribute to formation of a, halocline which seals the anoxic hypolimnion from the reservoir surface in midsummer. Conductivity decreased west to east, 2980-1800. pmhos/cm. Maximum mean annual phytoplankton standing crop in Red River arm was 36 percent greater than midlake. Eutrophication was evident.
Date: December 1978
Creator: McCullough, William P.
System: The UNT Digital Library