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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
Spatial and Temporal Patterns of Areal and Volumetric Phytoplankton Productivity of Lake Texoma (open access)

Spatial and Temporal Patterns of Areal and Volumetric Phytoplankton Productivity of Lake Texoma

Phytoplankton productivity of Lake Texoma was measured for one year from August 1999 to August 2000 for four stations, using the oxygen change method and laboratory incubation. Mean values of the photosynthetic parameters, PBmax and alphaB ranged from 4.86 to 46.39 mg O2.mg Chl-1.hr-1 for PBmax and 20.06 to 98.96 mg O2.mg Chl-1.E-1.m2 for alphaB. These values were in the range to be expected for a highly turbid, temperate reservoir. Estimated gross annual areal productivity ranged from 594 g C.m2.yr-1 (P.Q. = 1.2), at a station in the Washita River Zone to 753 g C.m2.yr-1 at a station in the Red River Zone, of the reservoir. Gross annual areal productivity at Station 17, in the Main Lake Zone, was 708 g C.m2.yr-1. Gross areal and volumetric productivity showed distinct seasonal variation with Photosynthetically Available Radiation (PAR) and temperature. Trophic status estimated on a station-by-station basis, using net productivity values derived from gross productivity and respiration estimates, was mesotrophic for all the stations, though one station approached eutrophy. Net productivity values ranged from 0.74 to 0.91 g C. m-2.d-1. An algal bioassay conducted at two stations in August 2000, revealed that phosphorus was most likely the nutrient limiting photosynthesis at both …
Date: August 2001
Creator: Baugher, Tessy
System: The UNT Digital Library
The Life History and Ecology of Camelobaetidius Mexicanus (Ephemeroptera: Baetidae) from Honey Creek, Oklahoma (open access)

The Life History and Ecology of Camelobaetidius Mexicanus (Ephemeroptera: Baetidae) from Honey Creek, Oklahoma

The primary objective of this study is to describe the life history of Camelobaetidius mexicanus living in Honey Creek in south central Oklahoma. Specific objectives were to determine emergence phenology and behavior, describe nupital flight and female oviposition, measure subimaginal and imaginal life spans, examine egg morphology and time to hatching, describe larval microdistribution, analyze gut contents and to determine voltinism from nymphal head capsule widths and adult emergence.
Date: August 1995
Creator: Wagner, Paul F.
System: The UNT Digital Library
A Study of the Ways in Which the Canadian County Oklahoma Farm Women's Home Demonstration Club Market Members Earned and Used Their Income 1931 - 1938 (open access)

A Study of the Ways in Which the Canadian County Oklahoma Farm Women's Home Demonstration Club Market Members Earned and Used Their Income 1931 - 1938

This study examines the membership of the Canadian County Oklahoma Farm Women's Home Demonstration Club Market and its funding usage between the years 1931 and 1938.
Date: August 1939
Creator: Thompson, Harvey Anne
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
A History of WKY-AM (open access)

A History of WKY-AM

The problem of this study was to document the history of radio station WKY, Oklahoma City, and to locate its place within the development of American radio broadcasting. This thesis divides WKY's history into two periods: 1920 through 1925, the years it was operated by Earl Hull, and 1926 through 1989, after it was acquired by E. K. Gaylord. The purpose of this study was to record the history of the oldest radio station operating west of the Mississippi River, its effect on the broadcast industry in general, and its effect on Gaylord Broadcasting Corporation, the parent organization. The study also explored the innovations. in both programming and engineering that caused the station to grow into one of the most popular radio stations in the Southwest, as well as its decline in recent years.
Date: May 1991
Creator: Meeks, Herman Ellis
System: The UNT Digital Library
Life History of Mayatrichia ponta Ross (Trichoptera: Hydroptilidae) in Honey Creek, Turner Falls Park, Oklahoma (open access)

Life History of Mayatrichia ponta Ross (Trichoptera: Hydroptilidae) in Honey Creek, Turner Falls Park, Oklahoma

The life history and ontogenetic microhabitat change of Mayatrichia ponta Ross were investigated in Honey Creek, Turner Falls Park, Murray Co., Oklahoma, U.S.A. from August 1994 to August 1995. The shape of larval cases changed from a small cone to a cylinder. M. ponta had an asynchronous multivoltine life history with considerable cohort and generation overlap; five generations were estimated. The development rate was reduced in winter. The winter generations of M. ponta had wider head capsule widths (136-165 μm) than summer generations (121-145 μm). The sex ratio of adults was 1.43 ♂ : 1 ♀. Fecundity ranged from 46 to 150 eggs/female. Fifth instar larvae and pupae aggregated on the bottom side of substrates. Early instars were distributed evenly on all sides of substrates. General patterns of ontogenetic microhabitat shift in aquatic insects are categorized as flow mediated, flow independent, and population interactions and other resources mediated.
Date: December 1997
Creator: Wang, Yi-Kuang
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
A Cooperative Part-Time Training Program in the Public Schools of Tulsa, Oklahoma (open access)

A Cooperative Part-Time Training Program in the Public Schools of Tulsa, Oklahoma

The purpose of this study is to present the basic facts and principles involved in the organization and administration of the cooperative part-time training program in the public schools of Tulsa, Oklahoma.
Date: 1947
Creator: Taylor, S. Wayne
System: The UNT Digital Library
The Development of Railroads in Oklahoma (open access)

The Development of Railroads in Oklahoma

This thesis is a study of the growth and expansion of railroads in Oklahoma.
Date: 1948
Creator: McDonough, Terrence C.
System: The UNT Digital Library
An Analysis of the Contribution of a Given Educational System to the Defense of Democracy (open access)

An Analysis of the Contribution of a Given Educational System to the Defense of Democracy

The purpose of this study is four-fold: (1) to present through an analysis of life needs the nature and source of a curriculum best adapted to democracy; (2) to present fairly some of the reasons why a curriculum must be founded on democracy if democracy survives the dangerous forces that threaten to obliterate its very existence; (3) to make an unprejudiced analysis of the regular situation now existing in Oklahoma schools at the present time to find whether her schools are meeting this challenge to democracy; and (4) to offer from the comparison of the summaries of these data recommendations whereby all schools may have a curriculum "rooted in the life of its people"--a program that contributes to democracy and permanent national defense.
Date: 1941
Creator: Maxwell, Maude Napier
System: The UNT Digital Library
The Incidence of Non-Promotion in the Intermediate Grades of the Elementary School and some of its Relationships (open access)

The Incidence of Non-Promotion in the Intermediate Grades of the Elementary School and some of its Relationships

The purpose of this investigation is to determine the incidence of retardation or non-promotion and the relationship of various characteristics of the retarded children in the fourth, fifth, and sixth grades of Sunset School.
Date: 1947
Creator: Morgan, Blanche Petty
System: The UNT Digital Library
A Comparative Study of the Qualifications and Duties of City School Superintendents' Secretaries in Oklahoma (open access)

A Comparative Study of the Qualifications and Duties of City School Superintendents' Secretaries in Oklahoma

The problem in this study is to make a comparison of the qualifications and duties of secretaries of city school superintendents in Oklahoma, with regard to academic training stenographic duties, duties pertaining to financial records and reports, banking duties, duties pertaining to general records and reports, duties pertaining to bus and transportation reports, teaching duties and miscellaneous duties.
Date: 1943
Creator: Glenn, Della Ola
System: The UNT Digital Library
Food Habits, Dietary Overlap and Electivity of Non-Game Insectivorous Fishes in an Ozark Foothills Stream (open access)

Food Habits, Dietary Overlap and Electivity of Non-Game Insectivorous Fishes in an Ozark Foothills Stream

Etheostoma spectabile, E. punctulatum, and Cottus carolinae were sampled Mar., 1983, - Feb., 1984, in Flint Creek, Oklahoma. Immature E. spectabile ate primarily microcrustaceans, while mature fishes relied more on mayflies and amphipods. Juvenile E. punctulatum fed upon mayflies, amphipods, and Asellus. Mature E. punctulatum ate primarily mayflies, and other relatively larger prey. Cottus carolinae consumed chironomids almost exclusively in Jan. - Feb., 1984, while mayflies were predominant the remainder of the year. No significant habitat partitioning between the two darters, and seasonal habitat segregation between C. carolinae and the two darters was found. Dietary overlap between the darters was significantly correlated (p<0.0005) to differences in x prey sizes.
Date: May 1985
Creator: Todd, C. Stan (Charles Stan)
System: The UNT Digital Library
Emergence, Growth, Drift and Microdistribution of Stoneflies (Plecoptera) in an Ozark Foothills Stream, Delaware County (open access)

Emergence, Growth, Drift and Microdistribution of Stoneflies (Plecoptera) in an Ozark Foothills Stream, Delaware County

Adult stonefly emergence, nymphal growth, drift and microdistribution were examined in Battle Branch, a secondorder, spring-fed stream, from November, 1982 to May, 1984. Adults of 22 species emerged successionally, with specific adults present every month. Searching emergent objects and the stream margin was best for collection of winter and early spring emerging species. Sweeping the streamside and light trapping were most efficient for late spring and summer emerging species. Nymphal growth for nine abundant species generally fit double log or semilog models. Drift was low, but did show a post-sunset pulse. Generally, leaf material was found to be significantly related (p<O.001) to density, diversity and biomass of stoneflies in Battle Branch.
Date: May 1985
Creator: Ernst, Mark R. (Mark Richard)
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 ÎĽm) 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
Drumming Behavior of Selected North American Stoneflies (Plecoptera) (open access)

Drumming Behavior of Selected North American Stoneflies (Plecoptera)

Drumming is first described for five North American stonefly species, Acroneuria evoluta, Doroneuria baumanni, Isoperla namata, Chernokrilus misnomus, and Pictetiella expansa. Signals of Acroneuria lycorias, Phasganophora capitata and Isoperla signata are further described. Drumming was not recorded from Amhinemura delosa. Signals of A. evoluta are the most complex yet recorded in Plecoptera. Doroneuria baumanni, P. expanse, C. misnomus and P. capitata have 2-way exchanges. Male D. baumanni produce two prolonged beats by rubbing the hammer on the substratum; male-female signals are non-overlapping in the first two species and overlapping in the latter two. Female P. capitata answered with an unusually long sequence of beats. Two male Isoperla species produced monophasic calls without female answers. Female A. lycorias answered taped male signals with monophasic signals like all observed females.
Date: December 1983
Creator: Maketon, Monchan
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
The Improvement of Reports to Parents (open access)

The Improvement of Reports to Parents

The purpose of this study is to determine an adequate and justifiable report to the parents regarding the progress of students in the public schools of the Colbert community, Colbert, Oklahoma.
Date: 1951
Creator: Mantooth, Elmer Herle
System: The UNT Digital Library
Untrammeled by Man? An Ethnographic Approach of Outdoor Recreation Management in Charon's Garden Wilderness (open access)

Untrammeled by Man? An Ethnographic Approach of Outdoor Recreation Management in Charon's Garden Wilderness

Charon's Garden Wilderness Area within the Wichita Mountains National Wildlife Refuge in Oklahoma is a landscape that is granted federal protection through the Wilderness Act of 1964. The discourse of wilderness management is influenced by governmental policies and practice which organize knowledge surrounding the natural landscape, like with the formation and semantics of the Wilderness Act. The Wilderness Act establishes characteristics that are designed to monitor and control the landscape and serve as a baseline and criterion for further wilderness preservation. These characteristics render the wilderness space as governable. Conservation management alternatives are identified which bypass the duality of nature from western society suggested by the discourse of environmental policy. These alternatives are understood under two notions of behaviors and perceptions. The project's goal is to uncover wilderness users' recreation behaviors and perceptions of wilderness as a designated space. Through understanding and assessing user's behaviors and perception of wilderness, alternative policies and practices that offer sustainable management practices and recreation opportunities can be developed.
Date: December 2018
Creator: Lukins, Gabrielle M
System: The UNT Digital Library
A Study of Industrial Arts Programs of the Teacher Training Institutions of Oklahoma to Determine if the Teachers of Industrial Arts in the High Schools of Oklahoma are Receiving Adequate Training (open access)

A Study of Industrial Arts Programs of the Teacher Training Institutions of Oklahoma to Determine if the Teachers of Industrial Arts in the High Schools of Oklahoma are Receiving Adequate Training

The purpose of this study is to determine to what extent the high school teachers of industrial arts in the State of Oklahoma are being used and trained to meet the apparent needs and trends in the field of industrial arts; and to make the results available in a helpful way to all persons interested in working in the field, or in preparing for, or preparing others for service in the field.
Date: 1950
Creator: Enderby, David R.
System: The UNT Digital Library
The Need for a Comprehensive Physical Education Program and Proposed Plan for Marietta, Oklahoma Public Schools (open access)

The Need for a Comprehensive Physical Education Program and Proposed Plan for Marietta, Oklahoma Public Schools

The purpose of this study is not only to show the need of a comprehensive physical education program but to submit a proposed plan to fulfill the need and correlating this plan of improvement with the traditional subject-matter type of school curriculum.
Date: 1950
Creator: Hopkins, John R.
System: The UNT Digital Library
Ideal Learning Spaces: the Student Perspective (open access)

Ideal Learning Spaces: the Student Perspective

Classrooms, libraries, student unions, and university campuses shape students’ learning experiences. These physical learning spaces set the stage for college student engagement and academic performance. Most of the research about the role of physical spaces in learning lacks the student perspective. The goal of this study was to offer a student-centered vision of ideal learning spaces. Students are the learners for whom learning spaces are designed, and this thesis examines the way students of one summer class at Oklahoma Baptist University conceptualized and interacted with their learning spaces. Data collection included surveys of the students, a focus group with members of the class, participant observation in the classroom, and interviews with students and the professor. Students viewed physical spaces as the backdrop for human action and chose spaces that supported their learning styles and goals. Students described supportive spaces as warm, purposefully crafted spaces, and full of other people who were seriously pursuing the same goals. This thesis explores the ways students conceptualized and interacted with learning spaces as a network of support for their learning and provides recommendations for the design of learning spaces that facilitate this support.
Date: May 2015
Creator: Sidler, Elizabeth D.
System: The UNT Digital Library