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Leaf Epidermal Transmittance Of Ultraviolet Radiation And Its Implication For Plant Sensitivity To Ultraviolet-Radiation Injury, Ronald Robberecht

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Leaf epidermal transmittance of ultraviolet radiation (280-400 nm) was examined in several plant species to determine the capability of the epidermis to attenuate solar ultraviolet radiation. Epidermal samples were mechanically isolated and examined with a spectroradiometer/integrating sphere for transmittance. A survey of 25 species exposed to natural insolation was conducted. Although the species differed in life form, habitat type, and epidermal characteristics, epidermal transmittance was generally less than 10%. Ultraviolet radiation was attenuated 95 to 99% in more than half of the species. In 16 species, flavonoid and related pigments in the epidermis accounted for 20 to 57% of the …

Snowmobiling In Utah: An Analysis Of Consumer Characteristics, Site Quality, And Carrying Capacity, Richard A. Haws

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A consumer characteristic profile of the snowmobile owners in Utah was compiled and compared to the general population in Utah and the United States. Other statistics were compiled which included user preferences of snowmobiling sites and machine characteristics.

Data were collected by a mail survey of snowmobilers during the 1974-75 snowmobiling season. Approximately 315 questionnaires were analyzed. Additional data were collected from the Utah Division of Parks and Recreation.

Total economic rent values were estimated for 58 sites in Utah. These values were then separated into location and quality values. This was done by reallocating trips to sites by means …

Corn Yields As Influenced By Irrigation Levels During Different Growth Stages, G. Dennis Wilson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Corn dry matter and grain yields were evaluated for 40 unique limited irrigation treatments and compared to a standard nonlimited treatment. The various treatments were imposed by an interaction of time (i.e., growth stage) and water level . Irrigation was so scheduled that each treatment received water at evaporative demand rates during either the vegetative or the pollination stage . The total irrigation water applied for the growing season ranged from 11 em to 43 em.

Dry matter and grain yields were essentially the same for all treatments. Limited irrigation in the vegetative stage did not reduce growth if there …

Development Of A Water Quality Model Applicable To Great Salt Lake, Utah, Craig T. Jones

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The development of a model capable of predicting the long term (seasonal) distribution of water quality constituents within Great Salt Lake was undertaken as a portion of the ongoing Great Salt Lake project at Utah State University. The overall goal of the project is the development of a modeling framework to assist the relevant decision making bodies in the comprehensive management of the Great Salt Lake system. Phase I of the project provided the overall structural framework for management of the Great Salt Lake system, identified data needs, and established priorities for the development of submodels for incorporation into the …

Attitudinal Effects Of Unified Mathematics At Hillcrest High School, Willis Dean Samuels

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to investigate the relationship between ( 1) attitude as expressed on Aiken 1s Mathematics Attitude Scale between students who had been taught Unified Mathematics and similar students who had not been taught Unified Mathematics. The sample consisted of 37 students in the treatment group and 46 students in the control group.

The students were given a copy of Aiken's Mathematics Attitude Scale. The responses were scored by the researcher. Seven null hypotheses were examined by calculating the means and standard deviations of each group. Comparison of the posttest means was performed by using …

Effects Of Heavy Metals (Cadmium, Copper, And Mercury) On Reproduction, Growth, And Survival Of Brine Shrimp (Artemia Salina) From The Great Salt Lake, Karl A. Gebhardt

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this paper is to report findings concerning the effects of cadmium, copper, and mercury on the brine shrimp Artemia Salina, of the Great Salt Lake. Metal toxicity was observed in relation to acute susceptibility, growth, reproduction, and hatching of the brine shrimp.

Heavy metal concentrations such as cadmium, copper, and mercury are known to be considerably higher in the Great Salt Lake than those in both freshwater and seawater. No published study has been concerned with heavy metal effects on organisms in salinities greater than seawater (35 grams per liter total dissolved solids). The experiments reported …

Availability And Perceived Adequacy Of Health Services In Utah, Cheryl L. Thayer

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

It is the general consensus that continuous and comprehensive health care of good quality should be available to all, under conditions that are convenient, comfortable, and not detrimental to the dignity or self-respect of the individual.

This study concerns the adequacy of health services as perceived by persons living in rural, urban, and urbanizing-rural areas of Utah. It is also a study (1) to determine the degree to which various demographics found to be related to differential medical needs in metropolitan areas is related to perception of health services, and (2) to assess the congruence between empirical and perceived availability …

An Economic Appraisal Of Reuse Concepts In Regional Water Supply Planning, Rangesan Narayanan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Using a conceptual model of a water supply firm, the necessary conditions for production and market efficiency are derived when renovated wastewater is considered as a potential water resource. The nature and extent of the supply augmentation due to recycled reuse is demonstrated using classical optimization techniques. Three stages of short-run supply corresponding to no recycling, partial recycled reuse and complete recycling of all reclaimable water are identified through appropriate Lagrangian Multipliers as well as graphical techniques.

A mathematical programming model is structured to determine the optimal water resource allocation and pricing policy for Salt Lake County. By maximizing the …

Sensitivity Analysis Of Surface Deposition In A Numerical Model Of Atmospheric Dispersion, Jackie Lewis

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Profiles of height-dependent diffusion which accommodate site-specific diffusivities were produced. A numerical model was adapted to incorporate the profiles. The model represented three-dimensional steady-state advection and diffusion of aerosols from an elevated point source. Sorption effects were simulated with surface attachment coefficients greater than unity. This proved effective in depleting the plume differentially upward from the surface.

Some Characteristics Of Female College Students Who Select Academic Majors In Fields Of Exact Science And Non-Exact Science: A Longitudinal Follow-Up, Paul David Warner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The present study, conducted in 1974, was a longitudinal follow-up of two groups of female subjects who had participated in an earlier study (Wright and Johnson, 1960) while the subjects were university students. One group of the subjects had majored in fields considered at that time to be traditionally feminine majors, i.e. social sciences, art, music, education, homemaking, etc. The other group had majored in fields of exact sciences, which at the time were considered more traditionally masculine. The purpose of the present study was to determine whether differences noted in the 1960 study will exist between these two groups …

The Use Of The Delphi Technique To Effect Decisions Concerning The College Level Examination Program By Higher Education Representatives, Terry Joseph Orme

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This study investigated the use of the Delphi technique in educational decision making.

Utah State institutions of higher education employ the College Level Examination Program (CLEP) to award credit in lieu of course work. However, since no uniform policies existed among them, 145 persons were selected on a representative basis to recommend a norming group to use for performance comparisons, the standard by which to judge CLEP performance, and the levels for maximum and minimum credit.

The Delphi technique, which employs a round-by-round questionnaire with feedback procedure, was used for six rounds to obtain sufficient consensus on the three aforementioned …

Consumer Profile Differences Among Utah And Idaho Boaters, Thomas D. Singleton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to describe and evaluate the consumer characteristics of boaters in Utah and Idaho. This has entailed a descriptive analysis of boater's socio-economic profiles, facilities and equipment, preferences and attitudes, and activity patterns.

Concomitantly a test of the hypothesis that boating is not a homogenous recreational activity was attempted. Two statistical analyses were carried out. The first test was to determine whether the profiles of boaters having different activity specialities differed. This was accomplished by finding the means of selected boater characteristics (i.e., income, children, length of boat) for each boating speciality. The L.S.D. multiple …

The Anti-Thyroid Effects Of Halogenated Phenols And Pyridinols, Leland Steven Beck

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This research was initiated to determine the mechanism(s) of action that could explain increased weight gain and decreased milk production in dairy cattle fed corn silage containing residues of certain organophosphate pesticides. It was proposed that the mode of action involved and alteration of thyroid physiology by the metabolites of the pesticides, namely halogenated phenols. Studies were carried out to determine the effect of tri-halogenated phenols and pyridinols upon T₄-binding to bovine serum albumin (BSA) and to liver mitochondria isolated from male rats. Using the rat as a model, feeding trials were performed to determine the effect of …

Albedo Of The Earth's Surface -- A Comparison Of Measurements Taken On The Ground And From Flying Platforms, Frank D. Eaton

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The main objectives of this study were to develop the intricacies of reflected solar radiation from different natural surfaces and to show comparisons between values sensed in space of emergent radiation to ground values obtained from accounting for anisotropic reflection and estimating the effect of the intervening atmosphere. Thus, this study demonstrated that a prior knowledge of the angular distribution of reflected radiation allows determining the true hemispherical reflected radiation from a narrow field of view instrument such as found on a flying platform. Measurements for determining the indicatrices were made from a tower-mounted Nimbus MRIR and, in one case, …

Population Dynamics And Harvest Of Canada Geese In Utah, John Tautin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A twenty-one year (1952-72) accumulation of banding data for Canada geese in Utah was studied to determine the distribution and chronology of the harvest of the geese and the effects that hunting regulations have had upon harvests and population parameters. The banding data were also used in an attempt to develop a population model capable of predicting population trends and desirable survival rates.

Within Utah, the bulk of the annual harvest (78 percent) takes place in the northern portion of the State in the vicinity of the Great Salt Lake marshes. In Northern Utah the harvest peaks on the opening …

Structural Geology Of Cutler Dam Quadrangle And Northern Part Of Honeyville Quadrangle, Utah, Douglas A. Sprinkel

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The mapped area is located in the north-central part of Utah. The northern part of the mapped area is located in the Basin and Range province and the southern part of the mapped area is located in the Middle Rocky Mountain province. The north-south and east-west dimensions of the mapped area are 11.1 miles and 5.1 miles, respectively.

Paleozoic rocks are exposed in Bear River Narrows, in Cache Butte Divide, and in the Wellsville Mountains. Paleozoic strata, in Bear River Narrows, dip west. The Ordovician Swan Peak Formation crops out in the eastern part of Bear River Narrows. It is …

Opinions Of Logan City Residents Towards The Bear River District Health Department, Darrell R. Borrowman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to determine the opinions and perceptions of the residents of Logan, Utah, concerning the role and responsibilities of the Bear River District Health Department, and whether those opinions and perceptions differed among low, middle and high income families; among residents having a high school degree or less, a bachelor's degree or less, or a graduate degree or less; and among men and women. A survey instrument was administered to a stratified random sample of 150 residents.

The data collected indicated that: (1) the majority of the residents of Logan, Utah, were not aware of …

Adjustment Of Persian Students At Utah State University, Homa Aflatouni

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Social adjustment of Persian students in terms of their social participation with Americans is analyzed by correlation and multiple regression analyses with six independent variables. The six independent variables are: education, attitude, time, English, social class, and religion. The results of correlation and multiple regression analyses support some of the hypotheses. The significant finding is that the level of education the Persian students completed before coming to the United States, their attitudes toward the Americans, and the length of stay in the United States are the most important factors while other variables are much less useful.

Riparian Environmental – Vegetation Interrelationships Along The Lower Escalante River Glen Canyon National Recreation Area, Utah, James R. Irvine

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Studies of environmental and riparian vegetation interrelationships along the lower Escalante River were conducted during 1974 and 1975. The study area included the Escalante River flood terrace between Harris Wash and Coyote Gulch.

Methods were developed compatible for wilderness use. Sixty-nine 1 x 10 meter macro-plots were taken at 23 locations. Measurements were taken of major environmental parameters thought to influence riparian vegetation: stratigraphy, soil texture and moisture, river bank angle and aspect, and height and width of flood terraces.

Canyon profile was found to be strongly influenced by geologic strata. Resistance to erosion by these strata determines canyon fluctuations …

Ecology Of The Common Snipe In Northern Utah, Samuel C. Winegardner

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The study addresses five areas relating to the biology and management of common snipe (Capella gallinago), including habitat requirements, food habits, breeding biology, sexing and aging and census techniques.

The primary habitat requirement of snipe was determined to be areas that were saturated or covered with shallow water. Secondary requirements were vegetation of less than 3 decimeters in height and between 30 and 50 percent density.

Food habit studies determined that snipe selected animal material with larger and more abundant organisms being preferred without regard to species . Plant material appeared to be ingested only incidentally.

Common snipe …

Plant Demographic Studies Of Tall Threetip Sagebrush-Grass Vegetation On The Eastern Snake River Plains, Idaho, Kenneth Harold Rea

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

It has commonly been assumed that grazing decreases the longevity of plants, however, very few studies address this question. Knowledge of mean age, longevity and other aspects of population dynamics would help improve estimates of productivity and nutrient cycling and aid understanding of range condition and trend. These data would also aid in developing a theory of community organization and control.

As a step toward these ends, pantograph records from twelve 1 m² plots established at the U. S. Sheep Station on the Snake River Plains of southeastern Idaho between 1923 and 1935 were examined. The plots were mapped …

Plant Demographic Studies Of A Desert Annuals Community In Northern Utah Dominated By Nonnative Weedy Species, David R. Duba

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Field and laboratory investigations were conducted relating to factors controlling distribution and abundance of annual species growing in a disturbed portion of the salt desert shrub zone on fine-textured soils. Dominant species on the site in the two study years were the nonnative, Halophytic, late-summer maturing, Halogeton glomeratus (Bieb.) C.A. Mey., and Bassia hyssopifolia (Pall.) Kuntze. Contrasting amounts of precipitation were received in the two years; in 1974, spring conditions were so dry that two early-maturing, sub-dominant annuals, Descurainia pinnata (walt.) Britton, and Lepidium perfoliatum L. were essentially absent. They successfully reproduced under more favorable 1975 conditions.

Studies on species …

Verbal Memory Of Preschool Indian And Non/Indian Headstart Children, Karen L. Swenson Carter

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this study was to test the hypotheses l) there is a significant difference between scores of Head Start children on the Uintah and Ouray Indian Reservation in Utah and the norms of the Verbal Memory Test from the McCarthy Scales of Children's Abilities; 2) there will not be an association between being Indian or non-Indian; 3 ) there will be an association between teaching styles and the children's performance on the language test. The T test was used to analyze all of the data. The experimental sample scored lower, but not significantly lower than the standardized norms. …

Ego-Identity Formation And Value Orientations In College Students And Working Youth, Gordon Bruce Munro

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An extension of James Marcia's research was undertaken to examine the ego identity development of college and working youth. A number of comparisons were made between college and noncollege working youth, males and females ranging in ages from 18-21. A value orientation instrument (measuring instrumental and expressive attitudes) constructed for this study, Marcia's (1964) Ego-Identity Incomplete Sentence Blank (EI-ISB) and Identity Status Interview, LaVoie's (1975) Child Rearing Instrument, Schwartz's (1 971) Future Orientation and Independence from Family Authority Scalograms were used in assessing these comparisons.

The results revealed significantly more identity diffusion individuals in college and significantly more identity achievement …

Irrigation Scheduling Program For Sugarcane, Terence L. Pearse

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An estimate of potential evapotranspiration is acquired to implement an irrigation scheduling program. Four equations, which estimate potential evapotranspiration (evaporation) were evaluated for prediction of Class "A" Pan evaporation. The equations used were Penman's combination equation, the Jensen-Haise temperature and radiation equation, and two of the Christiansen-Hargreaves polynomial regression type equations. Measured and calculated radiation was used together with two values of albedo. Four years of daily climate data from Rhodesia was evaluated by general linear regression methods.

Despite the significant variations between the four annual regression lines of each equation, the use of confidence intervals indicate that the Penman …

Portraits Of Logan, Leroy Lawson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this thesis is to explain some of the historical and personal developments in the painting of portraits.

For this project, eleven models were selected all of whom showed a wide range of emotional types and were painted in oil on canvas. The subjects were placed in shallow space, and color was explored as an emotional element. The personal experiences were evaluated and ideas for future development were suggested.

The Effects Of Chemical And Cultural Treatments On Gibberellin Levels In Strawberry Leaves And On The Induction Of Secondary Flowering, Richard N. Arteca

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Gibberellins 3, 4 and 7 were isolated from "Shasta" Strawberry (Fragaria X ananassa Duch.) leaves and identified by gas and thin layer chromatography. In young expanding leaves GA₃ occurred at 5 times the concentration of either GA₄ or GA₇.

CCC (2-chloroethyl-trimethylammonium chloride), SADH (Succinamic acid-2,2-dimethyl hydrazide), ethephon (2-chloroethylphosphonic acid), and UBI-P293 (2,3-dihydro-5-6-diphenyl-1,4-oxathiin) were applied to established plantings of three June-bearing strawberry (Fragaria X ananassa Ouch.) cultivars: 11 Shasta, 11 "Fresno" and "Tioga." Treatments were applied on alternate days for three weeks following anthesis of the king blossom. Levels of GA₃ and GA_{4 …}

Host And Habitat Preferences, Life History, Pathogenicity And Population Regulation In Species Of Protocalliphora Hough (Diptera: Calliphoridae), Terry Lee Whitworth

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The host, habitat preferences, and life histories of species of Protocalliphora were investigated in northern Utah. The effect of species of Protocalliphora on blood levels (hematocrit and hemoglobin) and weight gains of nestling birds also was studied.

A total of 1,819 bird nests were examined, representing 68 bird species from 10 habitats. Forty-eight percent (869) of the nests of 51 bird species found were infested. Eighteen species of Protocalliphora, including 11 undescribed, were collected.

Birds experiencing a high rate of infestation included most colonial nesters (such as bank swallows and yellow-headed blackbirds), cavity nesters (such as starlings and tree swallows, …

Breeding Biology And Pesticide-Pcb Contamination Of Western Grebe At Bear River Migratory Bird Refuge, Mark L. Lindvall

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The breeding biology of western grebe was studied at Bear River Migratory Bird Refuge, Utah in 1973 and 1974. More than 300 nests were located and data gathered on nesting habitat and success. Western grebe at Bear River selected nest sites for nearness to open water of approximately 30 em in depth. At least one young was hatching in 21 percent of the nests. Avian predation and abandonment of nests following drops in water levels caused the greatest loss of nests. Chlorinated hydrocarbons monitored in western grebes showed DDE, DDD, PCB, 1260, and PCB 1254 levels in 24 breast muscle …

Aerial Photography In Estimating Waterfowl Populations In Northern Utah, Timothy H. Provan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this project was to evaluate effectiveness of aerial photography as a waterfowl census technique. An aerial photographic pattern was formulated and tested during the spring and fall months of 1971 and 1972 at Ogden Bay Waterfowl Management Area, Weber County, Utah. The reliability and feasibility of the technique for censusing waterfowl proved effective and practical.

Eight flights per season, 4 routes per flight, and 30 photos per route taken over unit 1 of the Ogden Bay Waterfowl Management Area was the experimental design or pattern for the study. The level of accuracy and the cost involved with …