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Design Optimization Using Model Estimation Programming, Richard Kay Brimhall

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Model estimation programming provides a method for obtaining extreme solutions subject to constraints. Functions which are continuous with continuous first and second derivatives in the neighborhood of the solution are approximated using quadratic polynomials (termed estimating functions) derived from computed or experimental data points. Using the estimating functions, an approximation problem is solved by a numerical adaptation of the method of Lagrange. The method is not limited by the concavity of the objective function.

Beginning with an initial array of data observations, an initial approximate solution is obtained. Using this approximate solution as a new datum point, the coefficients for …

Fortran Programs For The Calculation Of Most Of The Commonly Used Experimental Design Models, H. Wain Greenhalgh

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Two computer programs were developed using a CDC 3100. They were written in FORTRAN IV.

One program uses four tape drives, one card reader, and one printer. It will calculate factorial analysis of variance with or without covariance and/or multivariate analysis for one to eight factors and up to twenty-five variables.

The other program is used for completely randomized designs, randomized block designs, and latin square designs. It will handle twenty-five treatments, rows (blocks), and columns. The program can handle fifteen variables using any number of these variables for covariates.

An Exposition On Bayesian Inference, John Laffoon

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The Bayesian approach to probability and statistics is described, a brief history of Bayesianism is related, differences between Bayesian and Frequentist schools of statistics are defined, protential applications are investigated, and a literature survey is presented in the form of a machine-sort card file.

Bayesian thought is increasing in favor among statisticians because of its ability to attack problems that are unassailable from the Frequentist approach. It should become more popular among practitioners because of the flexibility it allows experimenters and the ease with which prior knowledge can be combined with experimental data.

Rational Arithmetic As A Means Of Matrix Inversion, Jay Roland Peterson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The solution to a set of simultaneous equations is of the form A^-1 B = X where A^-1 is the inverse of A in the equation AX= B. The purpose of this study is to obtain an exact A^-1 through the use of rational arithmetic, and to study the behavior of rational numbers when used in arithmetic calculations.

This study describes a matrix inversion program written in SPS II, utilizing the concept of rational arithmetic. This program, using the Gaussian elimination matrix inversion method, is compared to the same method written in Fortran. Gaussian elimination …

Life Cycles Of Three Species Of Eimeria From The Uinta Ground Squirrel, Spermophilus Armatus, Kenneth S. Todd Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A study of the coccidia of the Uinta ground squirrel, Spermophilus (Citellus) armatus, was undertaken to determine the incidence of coccidia in a population of these ground squirrels, the life cycle and pathogenicity of the coccidia, and the host specificity of certain of the species of coccidia found in this and five other species of ground squirrels (S. richardsoni, S. variegatus, S. lateralis, S. columbianus, and S. beecheyi).

Uinta ground squirrels were live trapped and their feces examined to determine the incidence of coccidian infection. Specimens of S. armatus were maintained in the laboratory and given a pure inoculum of …

Development Of Leading Indicators For Housing Starts In Tremonton, Utah, Douglas I. Ward

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The possibility of developing leading economic indicators of housing starts, on a localized basis, was studied in Tremonton, Utah, for the period from 1958 to 1965. Data on any economic variable which might show a leading relationship to housing starts was gathered and synthesized to ascertain any predicting tendencies.

Several of the variables researched, particularly contracts awarded to Thiokol and Thiokol employment, showed a high positive correlation to housing starts; however, none showed any consistent leading pattern.

An accelerator relationship was found to exist between the average rate of change in Thiokol employment and housing starts. This finding, though not …

Irrigation Water Values In Cache County, Utah, Marlyn Fife

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In Utah all water, both on or below the ground surface, is considered public property. The right to use water is obtained by following certain subsiding procedures of appropriation through the office of the State Engineer. Any right to the use of water may be changed to some other beneficial use with the approval of the State Engineer; however, there must be no interference with other rights, unless proper compensation has been made.

Agriculture still uses most of the available water in Utah; However, farmers' needs for water are not exactly the same. When allocation per acre is the same …

Brisket Disease: Elemental And Oxalate Contents Of Cattle Forages On Two Utah Cattle Allotments, Raga Hafez I. Abaza

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

It was hypothesized that the hypocalcemia, hyperphosphoremia, hyperkalemia and the mild hypochromic microcytic anemia which existed in cattle afflicted with brisket disease could be due, at least in part, to nutritional disturbances. A chemical composition study was made of seven monocotyledonous plant species that comprise a major part of the diet and nine dicotyledonous plant species consumed by cattle and known or suspected of being poisonous. The plants analyzed were collected from two cattle grazing allotments, 7-mile and UM, in the Fishlake District, Fishlake National Forest, Utah, where brisket disease incidence is high. In each species the percentages on dry …

Some Aspects Of Agricultural Trade In Respect To Economic Development Of Thailand, Prasert Wongbhan

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The expansion of international trade, according to the traditional trade theory, can be the escape passage from economic stagnation. Furthermore, it will result in specialization within a country and increasing efficiency of production and real income.

The concept and measurement of economic growth are explored. Also the importance of international trade for a small nation is studied. The author traced the structure and trends of world trade, which are contributed to economic growth in the past. Then studied the structure and pattern of international trade of Thailand.

The growth in Thailand's participation in world trade is significant, but the rate …

Some Methodological Problems In The Economic Appraisal Of Increments Of Irrigation Water, David L. Wilson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The primary objective of this study was to establish a production function for alfalfa grown in the Sevier Valley using farm survey data. A secondary objective was to point out the analytical difficulties in establishing a production function for alfalfa.

A multiple regression model using 12 linear, 12 nonlinear, and 7 interaction terms was employed. A coefficient of determination of .70 was obtained for the model. Intercorrelation problems associated with the model limit its usefulness for economic and predictive purposes. The predictive value of the model was greatly increased by reducing the number of correlated variables included in the model. …

Eutrophication Trends Of Bear Lake, Idaho-Utah And Their Effect On The Distribution And Biological Productivity Of Zooplankton, David Nyquist

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Zooplankton of the littoral and limnetic zones of Bear Lake, Idaho-Utah, were collected over a 17-month period. Twenty-three species of zooplankton were recorded, as well as nine other species represented by both flora and fauna. At the time of sampling 17 physical and chemical parameters were also measured. Methods of analysis for the plankton and the environment are described and discussed.

The objectives of this project were fourfold:

1. To establish a record of the current zooplankton population before changes due to the increase of organic nutrients occur.
2. To compile a qualitative and quantitative standard against which future populations can be …

Quantitative Analyses Of Perennial Atriplex-Dominated Vegetation Of Southeastern Utah, Teja Singh

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

An intensive study of the applicability of mathematical methodology to the ordination and classification of desert vegetation was undertaken during 1962, 1963 and 1964. The study area, forming part of the shadscale zone vegetation and covering 13.5 square miles, is situated near Cisco in Grand County, southeastern Utah. Broad pediments originating from the nearby Book Cliffs are the main landform.

Geologically, the area was subjected to many cycles of erosion. The pediment and the Quaternary remnants thin out with increasing distance from the Book Cliffs. The alluvial fan deposits are readily recognizable at three distinct levels. Mancos shale, a lead-gray …

A Study Of The Relationship Between Anxiety, Manifest Needs, And Creativity In Upward Bound Students, Neal A. Davidson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Previous investigators have indicated that low socio-economic students have difficulty experiencing success on tests heavily loaded with verbal material. Differences in personality characteristics between students of high and low creativity have also been found. The purpose of the present study was to investigate the influence of manifest needs and anxiety on creative thinking.

The Taylor Manifest Anxiety Scale, which determines anxiety level, the Edwards Personal Preference Schedule, which measures manifest needs, and the Torrance Tests of Creative Thinking, which provides an index of creativity were administered to Spanish-American, Anglo-American, Negro, and Navaho high school students, who constituted the 1967 Upward …

The "Starvation Effect" And Tryptophan Pyrrolase Activity In The Vermilion Mutant Of Drosophila, Ernest E. Shelton Jr.

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The enzyme tryptophan pyrrolase is controlled by the vermilion locus in Drosophila melanogaster and is normally lacking in the vermilion mutants. During this investigation it has been demonstrated that v¹;bw flies have tryptophan pyrrolase activity when grown under near starvation conditions.

During development of the fly there is a peak of enzyme activity in the early third instar soon after the transfer to starvation medium. A second peak of enzyme activity occurs during the pupal stage. The activity in v¹;bw pupae is about 15% of the activity found in cn bw adults.

In v …

Factors Influencing Population Growth Of Tribolium Brevicornis In The Laboratory, Amin Gulla

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

To determine the effect of the factors of the environment (temperature, relative humidity, and food) on the population growth of Tribolium brevicornis, different levels of temperatures from 17.5°C - 37.5°C were used. Effect of these IeveIs of temperatures was tested upon both pre-embryonic and post-embryonic development. No hatching occurred at 17.5°C, but the threshold temperature (the minimum temperature for the development) was just before 17.5°C. The optimum temperature for the embryonic development was found to be between 32.5°C - 35°C.

With the use of the saturated salt solution according to Buxton (1931) and Buxton and Melanby (1934), certain humidity …

An Examination Of A Putative System For The In Vitro Synthesis Of Drosophila Tryptophan Pyrrolase, John P. Phillips

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A system, reported by Morrison (1964), for the in vitro synthesis of Drosophila tryptophan pyrrolase has been critically studied. This putative system is based on the addition of a Drosophila "RNA" extract to a Drosophila cell-free protein synthesizing system; the synthesized enzyme is then allowed to catalyze a specific reaction, the product of which is measured by direct adsorption.

The results of this study present a three-fold argument against the interpretation of synthesis of tryptophan pyrrolase in the Morrison in vitro system: (1) RNA from a null-allele, v^36f, stimulated the same tryptophan pyrrolase "activity" in the in vitro …

The Biosynthesis Of Aminolevulinic Acid In Relation To Iron And Enzyme, Daniel Ming-Yi Teng

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The survey of plant species for aminolevalinic acid synthetase (ALAS) source was conducted. Under the conditions of this study, spinach leaves were found to be a good source of ALAS activity. The amount of amino levulinic acid (ALA) synthesized by the plant extracts was very small and was rapidly metabolized to porphyrins. ALA and porphyrin synthesis was found to be confined to the particulate fractions. Rupturing of the particles with ultrasonifier enhanced the penetration of succinyl-CoA and increased the activity. Direct study of the ALAS activity was enabled by the utilization of C¹⁴-compounds to the isolation by column …

Interaction Of Inorganic And Organic Fluoride Ions With Available Calcium On Root Growth In Triticum Vulgare, L., Subbanaidu Ramagopal

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A method has been described to suspend seedling wheat roots in a saturated atmosphere. Wheat (Triticum vulgate, L.) seeds were germinated in aluminum trays and the seedlings transferred to seedling chambers. After a day's growth, the roots were treated with various concentrations of solutions containing CaSO₄, KCl, KF, NaCL, NaF, CH₃COONa, FCH₂COONa, K₂C₂O₄ and Na₂EDTA and observations were recorded 24 and 48 hours after treatment. The new root growth was described with respect to root hairs, root tissue collapse and root discoloration. Total length and …

Histochemical Investigations On The Effects Of Fluoride On Oxidative Enzymes From Pelargonium Zonale And Allium Cepa, Bachettira Wthappa Poovaiah

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The effects of fluoride fumigation on Pelargonium zonale leaves and also sodium fluoride infiltration of leaf sections and Allium cepa roots were studied in vivo.

Anatomical studies of fluoride-injured leaves showed a total collapse of the margin of the injured leaf. In injured regions the upper epidermal cells were normal and were the last to be destroyed. Detailed study of the vascular region of leaves near the injured area and also petioles from severely injured leaves showed clogging of xylem vessels by tyloses. Clogging of sieve tubes occurred, presumably, due to deposition of callose substance on sieve plates of …

Karyotype Analysis As An Index Of Radiosensitivity Of A Grass Hybrid, David R. Braegger

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Large differences exist between plant species in their response to ionizing radiation. The factors involved in radiosensitivities are complex and not well understood. The best criterion, so far, in studies on the acute lethal level of radiation for plant species is the average interphase chromosome volume (Sparrow et al. 1963). There are also close relationships that exist between DNA content, nuclear volume, total chromosome volume and radiosensitivity (Bowen, 1962; Sparrow et al. 1963; Sparrow et al. 1965). These investigators have observed in a series of species that an increase in nuclear volume is often accompanied by an increase in DNA …

The Influence Of Irrigating With Saline Water On The Energy Status Of Water In Soil And Plant, Rolando H. Braun

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

1. Changes in the energy status of water that occurred in Milville silt loam and in bean (Phaseolus vulgaris L.) plants growing on it , during two consecutive 6-day periods while being irrigated with saline solutions, were studied.
2. Total soil water potential (Ψ soil) (measured with thermocouple psychrometers), matric-potential (Ψ_m) (measured with tensiometers) were considered. In leaf samples, the total water potential (leaf) and the osmotic potential (Ψ_π)--after freezing-- were determined with thermocouple psychrometers; by difference, the pressure potential (Ψ_p) was obtained.
3. There is no evidence of close relationship between changes taking place in …

Movement Of Atrazine In Soil Under Furrow Irrigation, Jyothi Veerabhadrappa

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Movement of atrazine in response to furrow irrigations was studied using the samples of Timpanogos silt loam soil. Distribution in soil profile of surface applied herbicide was determined by drawing samples of water extracts through porous cylinders. Atrazine quantity was determined by spectrophotometer.

It was observed that the herbicide found in the water extracts was an indication of the quantity present in the soil. The herbicide moved readily with the applied water. Irreversible thermodynamic model could not be applied because of the initial and final boundary conditions. The pattern of movement was in conformity with the chromatographic theory.

A Study Of Factors Affecting The Germination Of Alfalfa And Safflower Pollen, Ling Lin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Pollen grains serve a very important role in the life cycle of flowering plants, in that they are involved in the transmission of inherited characteristics from generation to generation. Because of their small size the study of pollen grains has been necessarily associated with the development of the microscope. Not until the middle of the seventeenth century, when Hooke gave the world the compound microscope, was an instrument available with sufficient power to adequately reveal the shapes of pollen grains. However, two of Hooke's contemporaries, Malpighi and Grew, who used a simple microscope, are generally recognized as the co-founders of …

The Interaction Between Water Movement, Solute Uptake, And Respirational Energy In Plant Roots, Mohamed Sadek Tawakol

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Sunflower plants (Helianthus annus, var. Russian mammoth) were grown in Hogland nutrient solution. The roots (after being subjected to treatments with either respiratory inhibitors or respiratory stimulators) were used to measure the flux of water J_w, flux of solute J_s , and the rate of respiration Jo.

The thermodynamic theory of irreversible processes was used to examine the interaction between fluxes, and the changes in conductivity under different treatments. The rate equations for a root membrane of unit thickness were developed as:

J_w = L_wwV_w∆p + L_wsRT ln …

The Influence Of Thermo-Gradients Upon Water Movement And Retention In Unsaturated Soils, Jose V. Salazar

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Temperature differences of about 5, 10, and 15 V, were applied to uniformly packed and insulated horizontal column of Millville silt loam soil using mean temperatures near 13, 14, 15, 16, 17, 18, 19, 20 and 23.5 C. The temperature distribution along the soil column was determined using copper constantan thermocouples. Soil samples were taken to determine volumetric moisture content, and soil water potential, using the vapor pressure psychometer technique. The thermodynamic flow equation of Taylor and Cary, (1964) was used to calculate the hydro-thermal transfer coefficient (ß) as given by:

-ß = d(μ_w)_T / dlnT

where …

Experiments On The Inactivation Of Zinc By The Mineral Fractions Of The Soil, John J. Hassett

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Zinc deficiency, in many cases, is closely related to organic matter decomposition. DeRemer and Smith (1964) studied the effects of decomposing sugar beet tops on the reactions of Zn⁶⁵ in a Portneuf soil. They found that with time the Zn⁶⁵ associated with lime minerals, exchangeable, and water soluble fractions of the soil decreased, while that found with the organic and mineral fractions increased. This increase in the mineral fraction is of particular interest, since the majority of the Zn⁶⁵ was found to be with this fraction after a period of time. They also showed that the increase …

A Study Of Cotyledonal Cracking In Snap Beans (Phaseolus Vulgaris L.), John L. Morris

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Certain varieties of snap bean, Phaseolus vulgaris L., seeds are very susceptible to cracks that develop naturally across the cotyledons during pre-harvest, storage, or germination. This phenomenon is commonly known as cotyledonal cracking and may cause serious yield reductions on plants developing from affected seeds.

Cotyledonal cracking susceptibility of six white and six colored seeded varieties of snap beans were compared. Considerable differences were found in cracking susceptibility, but there was little or no relationship between seed coat color and cracking susceptibility.

An experiment was conducted to determine if a metabolic stress of the plant during the time of pod …

The Influence Of Supplemental Irrigation And Environmental Factors On The Yield And Nutrient Composition Of Napiergrass, Modesto Capiel

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Adoption of supplemental irrigation as a practice in Puerto Rico will be slow. Because irrigation is thought to be needed only occasionally, farmers look at it as an uneconomical operation. Even in the agricultural policy, supplemental irrigation is treated lightly, with limited funds allocated for research in this area.

The Free Sterol Content Of Selected Clones Of Alfalfa As Related To Seed Infestation By The Alfalfa Seed Chalcid, Rex Alton Richards

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The infestation of twelve selected clones of alfalfa by the alfalfa seed chalcid was measured. The free sterol content of the stems, leaves, flowers and pods of these clones was determined. A check was made to see if there was a correlation between the sterol content and the chalcid infestation.

Differences were found among the clones in the sterol content for each plant part. There were also significant differences in percent chalcid infestation in the 12 clones. Duncan's New Multiple Range Test pointed out which clones differed Significantly from the others.

Using linear regression analysis, the correlation coefficient of the …

Forage Yield And Chemical Composition Of An Orchardgrass-Bromegrass Pasture Mixture As Influenced By Clipping Frequency, Nitrogen Fertilization And Irrigation Regime, Vinayak G. Gawai

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The influence of agronomic practices on forage production and chemical composition of an orchardgrass-bromegrass pasture mixture was studied at the Greenville Farm, Logan, Utah, during 1960-1964. The soil is a well drained Millville Silt loam that has about a one percent slope and occurs on an alluvial fan. It is high in potash, phosphorus and calcium and is alkaline having a pH of 7.9 to 8.2.

Analysis of the clipping frequency showed that the yield of forage from four harvests was greater than from five harvests. This difference was greater on plots receiving high rates of nitrogen fertilization, and frequent …