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Electronic Theses and Dissertations

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Sinusoidal Oscillators Using Integrated-Circuit Gates, Andy Y. Young Jan 1970

Sinusoidal Oscillators Using Integrated-Circuit Gates, Andy Y. Young

Electronic Theses and Dissertations

Digital integrated circuits were initially developed to meet the critical needs of aerospace applications for reduced weight and power consumption and increased reliability. Because of the continued refinement of manufacturing processes and techniques, integrated circuits are now available at prices which make their usage very attractive even in the most competitive segments of the commercial and industrial systems field. By examining specification-sheets for various digital integrated circuits that have been marketed, one can deduce that many have been designed to meet particular requirements, and that in the effort to achieve the ultimate in one characteristic, one or more of the …

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A Survey Of Alumni Of South Dakota State University, Charles Fredrick Cecil Jan 1970

A Survey Of Alumni Of South Dakota State University, Charles Fredrick Cecil

Electronic Theses and Dissertations

This thesis will attempt to gather alumni information not now available but needed for the following reasons: 1. Obtain an evaluation of the university’s programs from those who have availed themselves of those programs; 2. Gather demographic information on alumni which until now has not been available; 3. Gather information on what types of employment into which graduates enter; 4. Obtain financial data on alumni to better carry out the university’s efforts in fund raising and public relations; 5. Obtain information on the attitudes of the graduates and on their opinions of the state of South Dakota, which is presently …

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Rigidity Of Four-Bolt And Six-Bolt End Plate Connections, Roger William Eastman Jan 1970

Rigidity Of Four-Bolt And Six-Bolt End Plate Connections, Roger William Eastman

Electronic Theses and Dissertations

A.General The 1969 AISC Specification for Design, Fabrication and Erection states about connections: All, connections, the rigidity of which is essential to the continuity assumed as the basis of the analysis, shall be capable of resisting the moments, shears-and axial loads to which they would be subjected by the full factored loading or any probable partial distribution thereof. The building specifications do not specify types or shapes of connections, only that they shall satisfy the conditions imposed upon them. With the acceptance of plastic design, the need arose for an economical and efficient connection. End plate connections can satisfy these …

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An Adaptive Redundancy Reduction Technique, Seon J. Chung Jan 1970

An Adaptive Redundancy Reduction Technique, Seon J. Chung

Electronic Theses and Dissertations

In telemetry systems, the limited power available from the RF transmitter imposes a constraint on the data transmission rate. For example, a spacecraft’s ability to communicate with a ground receiving station decreases with the square of the distance, and electrical power to operate the system increases with the data transmission rate. To solve this problem, considerable attention has been devoted toward improving the efficiency of telemetry systems by selecting advantageous coding, modulation and reconstruction techniques. One technique which is used to achieve this goal is to design a telemetry system which transmits only the significant information contained in the source …

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Dissolved Oxygen Concentration In The Big Sioux River Downstream From Sioux Falls, South Dakota, During Winter Conditions, Bernard Emerson Poppenga Jan 1970

Dissolved Oxygen Concentration In The Big Sioux River Downstream From Sioux Falls, South Dakota, During Winter Conditions, Bernard Emerson Poppenga

Electronic Theses and Dissertations

The Big Sioux River originates in northeastern South Dakota and in general flows southward to Sioux City, Iowa, where it joins the Missouri River. A major portion, 69 percent, of the Big Sioux River Basin is located in South Dakota. The remaining 31 percent of the basin's 9,570 square miles is distributed almost equally between the states of Iowa and Minnesota. The climate of the Big Sioux River Basin is described as midcontinental, subhumid, and with rapid fluctuation of temperature. Temperatures of over 100° Fare not uncommon during summer months and temperatures frequently fall below 0° F during the winter …

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Sensitivity Analysis Of The Sdsu River Basin Model, Kunjipalu Thoppil Jan 1970

Sensitivity Analysis Of The Sdsu River Basin Model, Kunjipalu Thoppil

Electronic Theses and Dissertations

The demand for water has increased continually in all parts of the world while the quantity available is essentially unchanged. Further, the projected increase in demand for different categories of use, particularly municipal consumption, manufacturing, mining and power generation will lead o a water shortage in the future. For example, by the year 2000 the effluent of municipal swage plants is expected in industrial wastes. The average annual streamflow that discharges into the ocean from the continental United States is essentially fixed and amounts to 1100 billion gallons of water per day. It is estimated that by the year 2000 …

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Elastic Stress Distribution In Square Plates Weakened By A Large Central Elliptical Or Circular Notch, Sameh M. Kanan Jan 1970

Elastic Stress Distribution In Square Plates Weakened By A Large Central Elliptical Or Circular Notch, Sameh M. Kanan

Electronic Theses and Dissertations

The main objective for this investigation is to examine the applicability of the finite difference method in obtaining the elastic stress distribution in a square plate weakened by a large elliptical or circular notch. A square mesh is used with maximum subdivisions as allowed by the storage capacity of the computer available at South Dakota State University. The nodal points of the mesh are placed in such a way as to give an approximate outline of the circular or elliptical shape. The plates under study are simply supported along two edges and free along the other two, and subjected to …

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An Economic Analysis Of Selected Irrigation Systems Applicable To The Eastern Missouri Slope Area Of South Dakota, Myron W. Wolff Jan 1970

An Economic Analysis Of Selected Irrigation Systems Applicable To The Eastern Missouri Slope Area Of South Dakota, Myron W. Wolff

Electronic Theses and Dissertations

For many years the prospect of irrigation development has captured the minds of farmers, agribusinessmen, and residents of the Eastern Missouri Slope area of South Dakota. The area has shared in the over-all technological advance in agriculture, but agricultural production and incomes have remained highly variable. This variability is generated by inconsistent yields caused by extreme annual fluctuations in the quantity and seasonal distribution of rainfall. Irrigation is the logical solution for stabilizing production and income. In the last decade there has been a major transition from gravity to sprinkler irrigation systems. Economic and physical factors have caused the trend …

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The Quality Of Surface Runoff From A Farmland Area In South Dakota During 1969, Rick D. Benson Jan 1970

The Quality Of Surface Runoff From A Farmland Area In South Dakota During 1969, Rick D. Benson

Electronic Theses and Dissertations

The general objective of this investigation was to explore the pollutional characteristics of runoff from an agricultural drainage basin located in eastern South Dakota. The specific objectives of the investigation were: 1. To determine the quality of runoff from an agricultural drainage basin located near Brookings, South Dakota. 2. To investigate the frequency of runoff from the drainage basin throughout a full runoff season; that is, from the beginning of snowmelt runoff in the spring until the end of the rainfall season in late fall. 3. To determine the pollutional characteristics attributable to the suspended matter present in the runoff …

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Acceptable Regions For Approximations In Quality Control, Du Hung-Ching Jan 1970

Acceptable Regions For Approximations In Quality Control, Du Hung-Ching

Electronic Theses and Dissertations

The manufacturer's inspection of his own product or the product received from outside vender, serves two purposes: 1. To provide a basis for action with regard to the materials and goods at hand. For instance; to-decide whether the particular article or group of articles should be utilized, or whether some alternative disposition should be made, such as: inspected further, sorted, repaired, reworked or scrapped. 2. To provide a basis for action with regard to the future production process. For instance; to decide whether the process should. be left alone, or whether action taken to find and eliminate disturbing causes.

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Infiltration Lagoons As A Tertiary Treatment Device, Terry L. Druyvestein Jan 1970

Infiltration Lagoons As A Tertiary Treatment Device, Terry L. Druyvestein

Electronic Theses and Dissertations

As the United States continues to grow and expand industrially, increased mechanization and shorter work weeks will result in a populace which will expect to enjoy increasing amounts of leisure time. Part of this leisure time will be used to participate in outdoor recreation activities, the result being an increased demand on lakes and streams. Maintaining these waters in a suitable condition for recreation and other beneficial uses has become the concern of most Americans. The Water Quality Act of 1965 and the subsequent state water quality standards are ample proof of the concern given to the control of water …

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A Chromosome Study Of Chlorophytum Elatum, Dennis E. Driscoll Jan 1970

A Chromosome Study Of Chlorophytum Elatum, Dennis E. Driscoll

Electronic Theses and Dissertations

The spider plant, Chlorophytum elatum R. Br., a member of the family Liliaceae, is a native of South Africa. It has been propagated almost exclusively by vegetative means and it is now grown widely over the world as an ornamental plant. Many studies by other workers have revealed that with only two exceptions all species in the genus Chlorophytum have somatic chromosome numbers that are multiples of seven, ranging from 14 to 56 (c.f. Darlington and Wiley, 1955). Although the chromosome number of Chlorophytum elatum has ·been reported to be 2N = 28 (Sato, 1942; Baldwin and Speese, 1951) information …

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Automatic Irrigation : Sensors And System, Herman G. Hamre Jan 1970

Automatic Irrigation : Sensors And System, Herman G. Hamre

Electronic Theses and Dissertations

As the world in which we live becomes more crowded, the specter of food shortage looms larger. As long as the world population is increasing, the food supply must also be increased to offset predicted shortages. One area under development is the ocean, and federal money is being invested in research on ocean farming techniques. More immediate gain, however, may be obtained by bolstering the already immense capability of the agricultural community. This may be accomplished by increasing the yield of the land under cultivation, or by enabling more land to be cultivated. Irrigation has been used successfully in aiding …

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An Urban Comprehensive Planning Model For Resource Allocation, Thomas Francis Galligan Jan 1970

An Urban Comprehensive Planning Model For Resource Allocation, Thomas Francis Galligan

Electronic Theses and Dissertations

In an address to his cabinet on August 25, 1965, President Lyndon B. Johnson announced a revolutionary system of planning and programming and budgeting throughout the Federal Government "• • • so that through the tools of modern management the full promise of a finer life can be brought.to every American at the lowest possible cost." The tools of modern management to which the former President referred are those employed within the Planning-ProgrammingBudgeting System (PPBS) process. Recently, in seeking solutions to urban problems, urban planners also have focused their attention on these tools of modern management. Amelioration of urban problems …

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Erosion Protection For The Outlets Of Small And Medium Culverts, Robert A. Hipschman Jan 1970

Erosion Protection For The Outlets Of Small And Medium Culverts, Robert A. Hipschman

Electronic Theses and Dissertations

The development of modern roadways has been regarded as one of the most outstanding accomplishments of the past generation. It has created a society of greater mobility than any of its ancestors. The massive stretches of freeways, expressways, and turnpikes are omnipresent, testifying to a modernization of man that was inconceivable fifty years ago. The design of such trafficways was of no mere coincidence. Millions of dollars and man-hours have been expended on the creation of this vast transportation complex. Continual improvements and new ideas have evolved the highway from rugged wagon trails to its present place of eminence. Included …

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Cost Evaluation Of Municipal Water Hardness Reduction And Private Softening For The City Of Brookings, South Dakota, Keith Allen Kelton Jan 1970

Cost Evaluation Of Municipal Water Hardness Reduction And Private Softening For The City Of Brookings, South Dakota, Keith Allen Kelton

Electronic Theses and Dissertations

Nature of the Project The City of Brookings, South Dakota, is a university town with a total estimated population of 13,000, including a campus enrollment of 6,000. On March 3; 1970, Brookings' voters passed a bond issue to expand the present water treatment facilities by increasing both production and storage. The new treatment plant will have a maximum daily production capacity of 4 million gallons, storage for 3 million gallons and will supplement the supply being treated by the existing plant. The new plant will consist of aeration to remove iron and manganese, lime and alum treatment to partially soften …

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Parametric Programming On An Analog Computer, Vinod B. Kumar Jan 1970

Parametric Programming On An Analog Computer, Vinod B. Kumar

Electronic Theses and Dissertations

The object of this investigation is to use the general purpose analog computer to simulate a linear programming problem and to extend the general purpose model developed by Pyne, to handle parametric programming, sensitivity analysis and post-optimum analysis. More-over, it is also intended to demonstrate how the information provided by the index row of the simplex tableau could be made available from this dynamic analog model.

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The American Negro In Selected Writings Of Robert Penn Warren, H. Lynette Olson Jan 1970

The American Negro In Selected Writings Of Robert Penn Warren, H. Lynette Olson

Electronic Theses and Dissertations

The purpose of this thesis has been to examine the various images of the Negro which Warren reveals in his writings and to analyze Warren's own attitude toward the Negro as expressed in those writings. Upon examining all ;of Warren's writings having to do with the Negro, one is left with three main pictures: first, the Negro as seen by the Southern white, second, the Negro as seen by the Northern white, and third, the Negro as seen by Warren himself. These pictures all contribute to reveal Warren's own attitude toward the Negro. Warren leads one to believe that the …

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The Origin And Development Of Sunday Competition Between The Hartford Courant And The Hartford Times, James M. Neal Jr. Jan 1970

The Origin And Development Of Sunday Competition Between The Hartford Courant And The Hartford Times, James M. Neal Jr.

Electronic Theses and Dissertations

Despite the fact that the Times was an afternoon paper and the Courant a morning paper, the two were more alike than they were different throughout the 1950s and 1960s. Each newspaper was increasingly influenced by persons not native to New England, but both retained executives with New England roots. They were closely balanced in manpower, they competed vigorously for the same kinds of news, and (after September, 1968) they presented similar Sunday packages. Carl Lindstrom's charge that newspapers were increasingly dominated by the business offices could hardly be applied fairly to either newspaper in Hartford by 1970. The publishers …

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Seasonal Thermal Expansion And Contraction Characteristics Of A Precast Prestressed Concrete Composite Pavement On U.S. Highway 14 - Bypass, Richard A. Phillips Jan 1970

Seasonal Thermal Expansion And Contraction Characteristics Of A Precast Prestressed Concrete Composite Pavement On U.S. Highway 14 - Bypass, Richard A. Phillips

Electronic Theses and Dissertations

An important structural consideration of rigid pavements is providing for expansion and contraction in the pavement. The purpose of this thesis is to determine the thermal expansion and contraction characteristics of a precast prestressed concrete composite pavement on U. S. Highway 14-Bypass near Brookings, South Dakota. Expansion and contraction measurements, obtained once every three months, and the corresponding temperatures were used to reach the objective. Precast prestressed concrete panels arranged transversely and longitudinally to the roadway will be considered. Present research on the U. S. Highway 14-Bypass composite pavement is part of a five-year cost and performance study. The research …

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Bridge Girder Webs Subjected To Horizontal Loads, Randall Felix Preheim Jan 1970

Bridge Girder Webs Subjected To Horizontal Loads, Randall Felix Preheim

Electronic Theses and Dissertations

Common bridge construction practice in South Dakota involves suspending the deck finishing machine and the freshly poured deck overhang from temporary metal brackets. These brackets are attached to the webs of the exterior plate girders. When loaded during construction, the brackets transmit to the web a vertical shearing force plus a couple. Since the webs are not designed for carrying horizontal loads, this type of loading could overstress the webs and appreciably lower their ultimate resistance to buckling. With specifications now permitting large depth to thickness ratios, deflections as well as stresses may be excessive. Rotation of the brackets, caused …

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Flexural Analysis Of Two-Way Slabs By Yield-Line Theory, D. Bapu Rao Jan 1970

Flexural Analysis Of Two-Way Slabs By Yield-Line Theory, D. Bapu Rao

Electronic Theses and Dissertations

The yield-line theory provides a powerful tool for studying the flexural behavior of reinforced concrete slabs at ultimate load. The ductility of steel reinforcement and the plastic properties of concrete material constitute the basis for this theory. Therefore, the application of yield-line theory depends on full plastic behavior in the slab at failure; thus, the slab is assumed to be under reinforced. Yield lines initiate at locations of maximum stress and with increasing load they propagate to a full yield-line pattern; at this stage the slab is divided into-segments and is subjected to its maximum useful load. However, due to …

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Analysis Of The Flow Variation Of The Big Sioux River, Kerwin Luther Rakness Jan 1970

Analysis Of The Flow Variation Of The Big Sioux River, Kerwin Luther Rakness

Electronic Theses and Dissertations

The main objectives of this study were to determine the flow variation of the Big Sioux River throughout the year, and to estimate the probable effects of increased water resources development on this flow. Flow-duration tables were prepared for six different flow-gaging stations located on the Big Sioux River and one station located on the Skunk Creek tributary. These tables were prepared for periods of one third of a month throughout the year. The mean or average flows for these time periods were also determined. It should be emphasized that the conclusions drawn from this investigation are based on the …

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Voltage (60 Hz) Breakdown Strength Vs. Temperature Of Octafluoropropane (C₃F₈) Gas Exposed To Uniform And Non-Uniform Electric Fields, Edward J. Roman Jan 1970

Voltage (60 Hz) Breakdown Strength Vs. Temperature Of Octafluoropropane (C₃F₈) Gas Exposed To Uniform And Non-Uniform Electric Fields, Edward J. Roman

Electronic Theses and Dissertations

Gaseous insulation is at least as old as air itself. In the early days of the electrical industry air was depended upon extensively as an insulating medium. Air, in fact, is not too bad as an insulator and today it is still used for this purpose. Air is noninflammable, nonexplosive, plentiful and it has good dielectric characteristics. Over the years, however, there was a need for insulating mediums which had higher dielectric strength than air. Solid and liquid insulating mediums gained wide use because of the higher dielectric strengths. However, solid and liquid insulating mediums possessed some undesirable characteristics. Solids …

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Optimum Design Of Transversely Loaded Concrete Beam, Sheng Lung Tsai Jan 1970

Optimum Design Of Transversely Loaded Concrete Beam, Sheng Lung Tsai

Electronic Theses and Dissertations

American agriculure has advanced considerably in recent years. These unprecedented advances result primarily from recent developments which have occurred in agriculture science and technology. Recent trends have been toward the feeding of more animals on fewer feedlots. The concentrating of large numbers of animals has undoubtedly increased the efficiency of animal producion in certain parts of the country. But the confinement of large numbers of animals has undoubtedly increased the efficiency of animal production in certain parts of the country. Because waste management has become a major operational problem, improved methods of handling, treatment, and disposal of animal wastes must …

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The Effect Of Harvesting And Storage Methods On Chemical Composition And In Vitro Digestibility Of First Cutting Alfalfa Hay, Perry A. Fales Jan 1970

The Effect Of Harvesting And Storage Methods On Chemical Composition And In Vitro Digestibility Of First Cutting Alfalfa Hay, Perry A. Fales

Electronic Theses and Dissertations

The importance of alfalfa hay in dairy cattle feeding is generally acknowledged. The reasons why alfalfa is used so extensively in dairy cattle rations are due to its high protein content, high acceptability by cattle, its wide ·area of adaptation, and high yields. A popular way of handling the forage is to put it up as hay. South Dakota produced 3,261,000 tons of alfalfa hay in 1968. There were 73 million tons of alfalfa hay produced in the United States during 1968 (10) making it a crop of major importance. Farming practices have changed considerably the last ten years. Among …

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Discrete Diffusion Model For Mass Transfer In Multi-Step Processes : Mathematical Development, Experimental Study, And Evaluation Ofapplicability To Design Work / By Luis David Sanchez-Puyana, Luis David Sanchez-Puyana Jan 1970

Discrete Diffusion Model For Mass Transfer In Multi-Step Processes : Mathematical Development, Experimental Study, And Evaluation Ofapplicability To Design Work / By Luis David Sanchez-Puyana, Luis David Sanchez-Puyana

Electronic Theses and Dissertations

No abstract provided.

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A Fire Service Protection Study In A Semi-Rural County, John Daniel Holloway Jan 1970

A Fire Service Protection Study In A Semi-Rural County, John Daniel Holloway

Electronic Theses and Dissertations

No abstract provided.

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A Heat Transfer Study Of A Concentric Triple Tube Heat-Exchanger, Guo-Tsuen Ding Jan 1970

A Heat Transfer Study Of A Concentric Triple Tube Heat-Exchanger, Guo-Tsuen Ding

Electronic Theses and Dissertations

No abstract provided.

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A Novel Fm/Am Telemetry Transmitter, Robert L. Lounsbery Jan 1970

A Novel Fm/Am Telemetry Transmitter, Robert L. Lounsbery

Electronic Theses and Dissertations

The transmission of information is in many cases vital to modern research. An example is the transmission of information which concerns the physiological phenomena taking place inside the body of an unrestrained animal. The transmission of the information has to be accomplished with a minimum amount of-discomfort to the animal. A physical connection to the sensor would cause much discomfort to the animal and would not indicate a normal situation. Therefore, in recent years the information gained from a sensor (inside of an animal's body) has been used as the intelligence to modulate a small telemetry unit. This information is …

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