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A Minimum Problem Connected With Complete Residue Systems In The Eisenstein Integers, David Peter Ochsner Apr 1972

A Minimum Problem Connected With Complete Residue Systems In The Eisenstein Integers, David Peter Ochsner

Electronic Theses and Dissertations

History tells us that one of the most interesting topics of mathematics is elementary number theory, the arithmetic Gauss spoke of when he said, “Mathematics is the queen of the sciences and arithmetic the queen of mathematics." We will investigate one conjecture concerning the theory of numbers. Throughout this paper small case Latin letters with the exception of e and i will represent integers where the set of rational integers is denoted by Z. 1he Latin letters e and i respectively represent the base for the natural logarithms and the so-called imaginary unit for the set of complex numbers. An …

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Study Of Laminar Heat Transfer In A Cone, Chang-Shieng Philip Hsia Apr 1972

Study Of Laminar Heat Transfer In A Cone, Chang-Shieng Philip Hsia

Electronic Theses and Dissertations

When a fluid flows through a conduit of different temperature from itself, a heat exchange occurs between them. In studying the heat transfer of the fluid in the conduit we can obtain information about the rate of heat absorption and losses, the temperature distributions, etc. This information is important in design work and to aid in the correct selection of construction and insulation materials. Sometimes the conduit or a section of the conduit is conical, as for example the diffuser in hydro-turbo machines and air compressors, the nozzles of steam or gas turbines, and various heating or exhaust ducts. Usually …

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Effect Of Varying Training Programing On The Maintenance And Development Of Different Levels Of Strength And Endurance, Gary Dean Nelson Apr 1972

Effect Of Varying Training Programing On The Maintenance And Development Of Different Levels Of Strength And Endurance, Gary Dean Nelson

Electronic Theses and Dissertations

The purpose of this study was to determine whether different levels of muscular strength, muscular endurance, and girth are maintained by employing a selected weight training program once a week. 1. There is a significant improvement in muscular strength, muscular endurance, and girth as a result of a five week, three-days per-week weight training program. 2. There is a significant improvement in muscular strength, muscular endurance, and girth as a result of a nine week, three-days per week weight training program. 3. A nine week, three-days-per-week weight training program results in a significantly greater gain in muscular strength, muscular endurance, …

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Alternative Methods Of Marketing South Dakota Wheat, William M.A. Murphy Apr 1972

Alternative Methods Of Marketing South Dakota Wheat, William M.A. Murphy

Electronic Theses and Dissertations

Wheat growers like other fanners speculate every time they plant or store a grain crop. Each year foreign demand, legislation, weather and other price influences cause market fluctuations which further aggravate the speculative situation. This problem is common among producers of hard red spring and winter wheat. Historically, farmers have marketed most of their grain during harvest season. The harvest season usually offers the crop year's low price for wheat.1 Despite this, farmers continue to deliver grain at harvest time. One might question; is this the only time to market grain? There was a time when grain buyers in the …

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Impulse Voltage Characteristics Of Class 155a °C To 220a °C Solid Insulating Materials, George C. Morfiris Apr 1972

Impulse Voltage Characteristics Of Class 155a °C To 220a °C Solid Insulating Materials, George C. Morfiris

Electronic Theses and Dissertations

The drastic increase in the ratings of power apparatus in recent years, as a, result of rapidly increased power needs, has brought about dramatic developments in electrical insulation. As voltage and power ratings increased, while size reduction and higher efficiencies were sought, temperatures which insulations must withstand without losing their characteristics also increased. In an effort to produce insulations with higher thermal and electrical properties, insulation manufacturers began producing electrical insulations utilizing synthetic high polymers, phenolic, and other thermosetting resins and silicones. The result has been a series of advanced insulation systems which the has been so rapid that a …

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Temperature Effects On Integral Abutment Bridges During Final Construction Stages, David Earl Holman Apr 1972

Temperature Effects On Integral Abutment Bridges During Final Construction Stages, David Earl Holman

Electronic Theses and Dissertations

This study of the integral abutment type bridge was based exclusively on the design used by the South Dakota Department of Highways. The design utilizes an HP10 x 42 steel bearing pile field welded to each bridge girder. To secure proper interaction between the concrete abutment and the steel girder, shear studs or a small stiffener are shop-welded to the girder web on a line coinciding with the eventual center line of the integral abutment which is two feet wide. Reinforced holes are also located in the girder web near the interior face of the integral abutment to accommodate shear …

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Attitudes Of Registered Nurses In Designated South Dakota Hospitals Toward Aspects Of Terminal Patient Care And Euthanasia, Sharon Ann Hofland Apr 1972

Attitudes Of Registered Nurses In Designated South Dakota Hospitals Toward Aspects Of Terminal Patient Care And Euthanasia, Sharon Ann Hofland

Electronic Theses and Dissertations

The problem under investigation in this study is: "What are the attitudes of professional nurses in designated hospitals in South Dakota toward the practice of passive and active euthanasia, and how do these attitudes vary when controlled for selected social and institutional factors?" Research related to this problem is important in that recent permissive legislative action on the abortion issue caught the nursing profession unprepared, and it is presently attempting to establish a position. To avoid a similar situation on the euthanasia issue, data regarding the current attitudes of nurses concerning the preservation of life and the management of the …

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A Study Of Ferroresonant Conditions On Distribution Circuits Involving Cable-Connected Power Transformers, Ronald H. Miller Apr 1972

A Study Of Ferroresonant Conditions On Distribution Circuits Involving Cable-Connected Power Transformers, Ronald H. Miller

Electronic Theses and Dissertations

As far as electric utilities are concerned, ferroresonance is undesirable on distribution or transmission systems because it may result in either transient or sustained over voltages under certain conditions. Lightning arrestor flashover, excessive transformer hum, transformer damage, cable damage, and phase reversals have been attributed to ferroresonance. The probability of ferroresonant conditions resulting in damage to equipment has only relatively recently risen to an appreciable level. The difference lies in the fact that the farroresonant circuit is nonlinear due to the inductive component. This component is a saturable core reactance, which has its impedance value dictated by the saturation characteristic …

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Reliability Study Of A Revision Of The Modified Los Angeles Rattler Test Using Class "C" Graded Aggregates, Dallas L. Hofer Apr 1972

Reliability Study Of A Revision Of The Modified Los Angeles Rattler Test Using Class "C" Graded Aggregates, Dallas L. Hofer

Electronic Theses and Dissertations

Both the producer and the user are concerned with a characteristic of an aggregate that may be best described as "durability." In a broad sense, durability means the ability of the aggregate to remain unchanged over a fairly long period of time in spite of adverse natural processes or forces to which it is subjected. Durability, as it applies to mineral aggregates, means the ability to resist degradation. Erickson has defined degradation as "A breaking down and/or disintegration of particles of sand, gravel, or stone, primarily due to alteration and subsequent decomposition of their mineral components, accelerated by the action …

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Simulation Of A Surface Thermal Anomaly, Corwyn Richard Meyer Apr 1972

Simulation Of A Surface Thermal Anomaly, Corwyn Richard Meyer

Electronic Theses and Dissertations

The demand for good quality water is rapidly increasing as the result of intensified agricultural practices and modern industry. At present fresh water supplies are adequate to meet the demand in most areas of the country. However, if present trends continue, the need for fresh water will increase faster than the development of freshwater resources. Surface water and ground water comprise the two main forms of fresh water. To date the greatest emphasis has been placed. on the development of surface water reserves although much larger quantities of fresh water are present in the form of ground water. In glaciated …

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Feasibility Study For A Biotelemetry Transmitter Using An Integrated Circuit Chip, August Louis Hinz Apr 1972

Feasibility Study For A Biotelemetry Transmitter Using An Integrated Circuit Chip, August Louis Hinz

Electronic Theses and Dissertations

The objective of this research project was to develop a radio telemetry system capable of transmitting the heart rate of the pheasant. Because literature relating to the heart rate of the pheasant is very scarce, data concerning voltage amplitude of the pheasant electrocardiogram (ECG) were needed. To telemeter the heart rate a biotelemetry transmitter was developed. This biotelemetry transmitter is to be used to study the heart rate of' pheasants through the breeding, nesting and brood raising cycle. The transmitter could also be used during the hunting season and other times of stress to determine how pheasants are affected by …

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Heat And Moisture Production In A Closed Environment Beef Building During Warm Weather, Martin L. Hellickson Apr 1972

Heat And Moisture Production In A Closed Environment Beef Building During Warm Weather, Martin L. Hellickson

Electronic Theses and Dissertations

The need for improved production facilities is emphasized by the fact that beef consumption is at record levels in the United States with continued growth predicted. The annual per capita consumption of beef and veal in the United States was nearly 73 pounds in 1949 and increased 56 per cent to approximately 114 pounds per person by 1969. The demand for beef is also increasing in developed areas throughout the rest of the world. Increases in demands for beef have stimulated the beef industry to make significant gains in production. The production of beef in the United States has increased …

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Developmental Analyses Of Biochemical Fuel Cells, Roderick James Mcneil Apr 1972

Developmental Analyses Of Biochemical Fuel Cells, Roderick James Mcneil

Electronic Theses and Dissertations

One of the newest areas of biological research, bioelectrochemistry, involves the production of electrical energy through the action of an enzymatic catalyst on a specific substrate. Previous research in the field of bioelectrbchemistry has led to controversy concerning the mechanisms of microbial (enzymatic) activity for power production. It is the purpose of this study to demonstrate whether particular microorganisms or their associated enzyme fractions are indeed responsible for the electrical activity observed in a biochemical fuel cell (BFC). The microorganisms and their associated enzyme systems utilized in this study are as follows: 1. Asperqillus niger - glucose oxidase (1.1.3.4 B-D-Glucose: …

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Production Of Staphylococcal Enterotoxin B In Foods With Varied Environmental Conditions, Robert Jefferey Heidelbauer Apr 1972

Production Of Staphylococcal Enterotoxin B In Foods With Varied Environmental Conditions, Robert Jefferey Heidelbauer

Electronic Theses and Dissertations

The number one cause of food poisoning is enterotoxin produced by certain strains of Staphylococcus aureus. Knowledge of the conditions which inhibit enterotoxin production in foods is of great economic importance. Previous research on staphylococcal food poisoning has been concerned with the presence and growth of Staphylococcus aureus in foods. Until recently, little work has been done with detection of the toxin in foods, even though proof of responsibility for the poisoning depends on direct demonstration of enterotoxin in the food. Before research on enterotoxin production could be feasible a rapid method of detection was needed. Early detection techniques involved …

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An Investigation Into The Transient Behavior Of Multichannel Queueing Systems, James R. Mccormick Apr 1972

An Investigation Into The Transient Behavior Of Multichannel Queueing Systems, James R. Mccormick

Electronic Theses and Dissertations

In today's world, the waiting lines or queues formed by people, machines, or other units are common and occur whenever the temporary demand for a service exceeds the capacity to provide it. These values may be the costs associated with idle production equipment and personnel or the lost sales due to unsatisfied customers. If one designs for sufficient facilities so that no queue builds up, then the operation is likely to be uneconomical due to excessive idle time at the service facility. If one designs the facility so that there is never any idle time at the service facility, then …

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A Follow-Up Study Of Adult Home-Economics-Related Occupational Courses Conducted In South Dakota, 1968-1969, Sandra Jenter Hanson Apr 1972

A Follow-Up Study Of Adult Home-Economics-Related Occupational Courses Conducted In South Dakota, 1968-1969, Sandra Jenter Hanson

Electronic Theses and Dissertations

The objective of this study was to investigate the adult home economics related occupational courses conducted in South Dakota during the 1968-1969 school term. At the time this study was initiated, there were no specific criteria for adult occupational classes in vocational education for South Dakota. Classes were offered for persons who had already entered the labor market and who needed training or retraining to achieve stability or advancement in employment. Class enrollment, length of time for the course, and/or charge per hour depended on the objectives of the class and the type of class offered. Classes could have been …

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Properties Of Six South Dakota Bovine Picornaviruses, Janet Marie Mattson Apr 1972

Properties Of Six South Dakota Bovine Picornaviruses, Janet Marie Mattson

Electronic Theses and Dissertations

Since the first enterovirus isolates in 1957 and rhinovirus isolation in 1962, more than 600 isolations of bovine picornaviruses have been reported. Previous workers have been concerned primarily with serological comparisons among their own isolates. Only two viruses, LCR4 and BEV I, are available to investigators for serologic comparison. Picornaviruses have been isolated from animals with. respiratory diseases, diarrhea, and histories of abortions. Interest has not been that great because of the vast number of strains isolated, and at present, the studied strains have no disease attributed to them. Little has been done with these strains of virus except to …

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Effect Of Planting Method And Seeding Rate On The Establishment Of Alfalfa Under Dryland And Irrigation, Lloyd H. Hansen Apr 1972

Effect Of Planting Method And Seeding Rate On The Establishment Of Alfalfa Under Dryland And Irrigation, Lloyd H. Hansen

Electronic Theses and Dissertations

Production of forage is one of South Dakota's greatest agricultural assets. The South Dakota Crop and Livestock Reporting Service indicated that 2,456,000 acres of alfalfa were harvested for hay in South Dakota in 1971 with an average yield of 1.55 tons/acre. In the future, irrigation will increase forage production and add a new dimension to South Dakota's agriculture. South Dakota ranked eighth among states in all cattle and calves on January 1, 1972. Full stands of alfalfa are essential for the production of high yields of quality forage for this growing livestock industry. Satisfactory establishment of alfalfa with a companion …

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Taxonomy Of The Agropyron Intermedium And Agropyron Trichophorum Complex, Emmanuel Kidane Mariam Apr 1972

Taxonomy Of The Agropyron Intermedium And Agropyron Trichophorum Complex, Emmanuel Kidane Mariam

Electronic Theses and Dissertations

The genus Agropyron contains many important species useful for pasture and hay as well as soil conservation throughout the temperate regions. In the United States most of the cultivated species of Agropyron have been introduced from Russia, Siberia, and other regions around the Black Sea. Varieties have been selected from many of the original introductions and also some introductions have been used in their original condition. In some instances, it has been difficult to correctly identify the original introduction since they may have been introduced as mixtures. Two of the most important Agropyron species Agropyron intermedium (Host) Beauv and Agropyron …

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Distribution And Physiological Effects Of Ddt, Ddd And Dde In Penned Double-Crested Cormorants (Phalacrocorax A. Auritus), Michael Rober Hannon Apr 1972

Distribution And Physiological Effects Of Ddt, Ddd And Dde In Penned Double-Crested Cormorants (Phalacrocorax A. Auritus), Michael Rober Hannon

Electronic Theses and Dissertations

Ecological and trophic distributions of chlorinated hydrocarbon residues in Lake Poinsett, South Dakota were studied. Components of the ecosystem analyzed were water, bottom sediment, zooplankton, benthic algae, crayfish, aquatic insects and fish. Concentrations of aldrin, DDD, DDE, DDT, dieldrin, endrin, heptachlor, heptachlor epoxide, lindane, methoxychlor and toxaphene were determined by gas chromatography and thin-layer chromatography. DDT and its metabolites, DDD and DDE, were the highest residues detected in all trophic levels examined. Heptachlor, heptachlor epoxide, aldrin, dieldrin and lindane were present in the majority of sample types, while neither endrin nor methoxychlor was detected above analytical confidence limits in any …

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Taxonomic Composition, Biomass, And Trophic Structure Of Grassland Invertebrates At Cottonwood, South Dakota, Pauline Estelle Hamm Apr 1972

Taxonomic Composition, Biomass, And Trophic Structure Of Grassland Invertebrates At Cottonwood, South Dakota, Pauline Estelle Hamm

Electronic Theses and Dissertations

This particular study is concerned with invertebrates found on a grassland ecosystem; therefore, most of the literature reviewed was limited to studies involving insects. Since the literature on ecosystems is extensive, only the following trends as listed by Clark et al. were reviewed: physical factor ecology, production ecology, and population ecology. Smith was among the first to emphasize physical factor ecology which stressed the importance of abiotic factors in regulating animal numbers. He first used the terms density-dependent and density independent. Production ecology introduced the study of more complex life communities and considered the trophic association or food-cycles and the …

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South Dakota Grain Elevator Location And Cost Analysis, Frederick Lorenz Apr 1972

South Dakota Grain Elevator Location And Cost Analysis, Frederick Lorenz

Electronic Theses and Dissertations

The objectives of this thesis are: 1. To review some of the major problems associated with the movement of grain and farm input supplies. 2. To estimate the relationship between the multiproduct elevators annual volume and its grain handling costs. 3. To estimate the cost of moving grain to the elevator from the farm and from the elevator to the first destination terminal. 4. To estimate, from objectives two and three, the least-cost size and number of country elevators in South Dakota. 5. To determine the least-cost size and location of country elevators in western South Dakota by applying methods …

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Effects Of Erythropoietin On Intestinal Iron Absorption In Rabbits, Thomas John Hajek Apr 1972

Effects Of Erythropoietin On Intestinal Iron Absorption In Rabbits, Thomas John Hajek

Electronic Theses and Dissertations

Erythropoietin ls a mammalian hormone synthesized primarily by renal tissues ln response to tissue hypoxia. the hormone accelerates erythropoiesis, the process of red blood cell (erythrocyte) production, Increasing oxygen transport to tissue cells. Accelerated erythropoiesis implies an increased rate of hemoglobin synthesis and, therefore, an increased demand for iron, which ls an integral part of the hemoglobin molecule. Iron, to meet this requirement, may be obtained by mobilizing storage iron or by enhancing dietary iron absorption. That erythropoiesis promotes increased absorption of dietary iron has been delineated. However, the actual mechanism involved has not been elucidated completely. It has been …

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Model Study Of Laterally Loaded Piles In Sand, Jeong- Shwu Liu Apr 1972

Model Study Of Laterally Loaded Piles In Sand, Jeong- Shwu Liu

Electronic Theses and Dissertations

The most common function of piles is to transmit foundation loads which cannot be adequately supported at a certain level down to a depth at which adequate support is available. The classification of piles in terms of loading may be considered as vertically or laterally loaded. The laterally loaded pile is a structural member which sustains transverse loads in a similar way a beam does. The lateral force that the pile foundations is subjected to may be induced by earthquake, water waves, moving vessels, wind force, and lateral earth pressure, etc. Early techniques for analyzing laterally loaded pile foundations completely …

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Mechanism And Regulation Of Nitrogen Assimilation In Klebsiella Pneuminiae M5al, Ming- Liang Li Apr 1972

Mechanism And Regulation Of Nitrogen Assimilation In Klebsiella Pneuminiae M5al, Ming- Liang Li

Electronic Theses and Dissertations

The pathway of the nitrogen atom after the initial nitrogen fixation reaction has taken place is not known. This study is an attempt to learn something about the enzymes that are involved in amino acid synthesis. The cell has varying demands for the intermediary metabolites of nitrogen, as the processes of protein and other polymer synthesis vary. In addition, the cell is often confronted with changing supplies of nitrogen and energy, as a function of environmental change. Efficient growth depends upon the optimum utilization of metabolites in response to variation in cellular needs. The bacterium Klebsiella pneumoniae not only has …

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A Comparative Study Of Nonparametric Methods For Pattern Recognition, Sangkoo F. Hahn Apr 1972

A Comparative Study Of Nonparametric Methods For Pattern Recognition, Sangkoo F. Hahn

Electronic Theses and Dissertations

The main objective of this thesis is to determine and compare the classification error probabilities of several nonparametric methods to parametric ones in practical or near practical conditions using computer simulation. The usefulness of the Asymptotic Relative Efficiency (ARE) is also observed. The ARE is used to compare one algorithm with another in the limit case conditions which are far from practical circumstances. Details of the ARE concept is given in Chapter II and some of the literatures. The next objective is the investigation of the complexity of the several algorithms studied. Many investigators are implementing their algorithms on computers, …

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Understanding And Accepting Self : A Measure Of Self Image Growth, Wanda M. Lightfield Apr 1972

Understanding And Accepting Self : A Measure Of Self Image Growth, Wanda M. Lightfield

Electronic Theses and Dissertations

The purpose of this research was to develop and test a technique which emphasized planned self-image learning experiences for children in a Head Start program. The goal of the program was to allow four- and five-year-old’s the opportunity to explore and begin to discover and know themselves. The series of four experiences used in this study was developed by the author to appeal to young children, be within their range of physical and mental capabilities, and have a positive effect on self-concept of body image. The hypothesis thus reads: When children are given opportunity to explore their individuality at an …

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A Study Of The System Treating Potato Processing Wastes At Fairfield Products Inc., Clark, South Dakota, Terry L. Hagin Apr 1972

A Study Of The System Treating Potato Processing Wastes At Fairfield Products Inc., Clark, South Dakota, Terry L. Hagin

Electronic Theses and Dissertations

During the 1970-1971 and the 1971-1972 processing seasons, Fairfield Products Inc. experienced serious waste disposal problems. Data obtained in June of 1971, shortly after the processing season ended, indicated that the 5-day Biochemical Oxygen Demand (BOD) of the Contents of the stabilization pond was 1180 mg/l. Numerous complaints from the citizens of Clark concerning the odor problem that had developed because of the overloaded treatment system were received by Fairfield Products Inc. as well as the State Department of Health. Acting upon these complaints, the State Health Department ordered Fairfield Products Inc. to retain a consulting engineer to design adequate …

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Modified Dugdale Model, Prem Chandra Gupta Apr 1972

Modified Dugdale Model, Prem Chandra Gupta

Electronic Theses and Dissertations

A precise determination of the influence of plastic yielding on the deformation and failure at a crack tip is needed for accurate predictions of the behavior of cracked bodies under static load large enough to cause fracture, and subcritical repetitive loads which cause fatigue. The catastrophic growth of cracks in plates under monotonically increasing load depends on a number of factors. A general view concerning the behavior of material at the leading edge of a crack is that plastic flow and subsequent fracture of the material is influenced by factors such as strain hardening, strain rate, the state of stress, …

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A Comparison Between Selected Weight Training Exercises And Ring Machine Training For The Development Of Iron Cross Strength, Joseph Anthony Leskoske Apr 1972

A Comparison Between Selected Weight Training Exercises And Ring Machine Training For The Development Of Iron Cross Strength, Joseph Anthony Leskoske

Electronic Theses and Dissertations

Gymnastic rules specify that a routine on the still rings should contain one strength move of at least medium difficulty. The iron cross and any of its variations fulfills this requirement. The investigator believes the iron cross is a "required elective" in any still ring routine whether the competition be regional, national, or international. A study of eighteen state high school gymnastic meets, 1969, 1970, 1971, reveals that all the state champion ring men performed the iron cross. Also, the top six ring men of the NCAA 1970 Championship performed this move. The cross is seemingly an integral move in …

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