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Electronic Theses and Dissertations

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Drain Modulation Of The Field-Effect Transistor Amplifier, John C. Lietz Feb 1968

Drain Modulation Of The Field-Effect Transistor Amplifier, John C. Lietz

Electronic Theses and Dissertations

Rapid transmission of inforn1ation from one point to another is extremely vital to our modern society. Millions of messages are transmitted each day through a variety of communication systems. A large majority of these systems rely upon some type of modulation process. The word "modulate" did not originate in the communications field. Like many other terms it was adopted because it aptly described the process to which it is now commonly associated. Basically the term means: to adjust; to regulate; to change; to alter; to vary; or to inflect as with the voice. For example, speaking and singing are both …

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Comparison Of Electric Strength Of Nitrogen And C4f8 Various Wave Shapes, John David Vinatieri Feb 1968

Comparison Of Electric Strength Of Nitrogen And C4f8 Various Wave Shapes, John David Vinatieri

Electronic Theses and Dissertations

All the electrical equipment involved in the generation, transmission, and distribution of electrical energy is exposed to switching surges and the effects of lightning voltages to some degree. Even the most modern protective devices, such as lightning arrestors, require a finite time to operate. Thus the insulation in generators, transformers, and switchgear must withstand high impulse voltages for the very short time required for protective devices to conduct the lightning voltages and switching surges to ground. The use of gases as insulation in electrical equipment offers certain advantages over the more conventional liquids and solids. In recent years attempts to …

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Storage And Retrieval System For Ground Water Quality Data In South Dakota, Rodolfo Lardizabal Laudencia Feb 1968

Storage And Retrieval System For Ground Water Quality Data In South Dakota, Rodolfo Lardizabal Laudencia

Electronic Theses and Dissertations

The three general objectives of this study are as follows: (1) to devise a storage and retrieval system for rapid and efficient retrieval of water quality data such as may be available in the State of South Dakota, (2) to develop a system which would enable the scientist of the Water Resources Institute of South Dakota State University and other agencies interested in water quality management to communicate more effectively with the public. This would aid in obtaining better water quality management practices and thus allow the best use of water, and (3) to develop flexibility in the data system …

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The Effect Of Test Cell Glass Cylinder Diameter On Gaseous Insulation Dielectric Strength, Thomas J. Lanoue Feb 1968

The Effect Of Test Cell Glass Cylinder Diameter On Gaseous Insulation Dielectric Strength, Thomas J. Lanoue

Electronic Theses and Dissertations

Areas of Investigation 1. To determine the effect of test cell glass cylinder diameter on gaseous insulation dielectric strength for uniform and non-uniform fields through experimental results and field plots. 2. To obtain an upper limit for gap spacing in different size test cells for uniform and non-uniform fields. 3. To determine the effect of frequent change of gas in cell during test. 4. To determine extraneous effects, such as cell clamps. 5. To suggest the size in which a test cell should be to obtain good results in gaseous insulation dielectric strength tests. These areas will be investigated by …

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Program Instruction In Use Of Lithographic Camera, Clayton Ransom Kinney Feb 1968

Program Instruction In Use Of Lithographic Camera, Clayton Ransom Kinney

Electronic Theses and Dissertations

Programmed learning is probably as old as mankind. In theory the essentials of this method consist of three major interdependent factors; 1) immediate feedback or knowledge to the learner of the adequacy of the responses, 2) the presenting of material in small enough units to allow rapid assimilation and reinforcement, and 3) the arrangement of such units in a sequence which continues to build upon and reinforce the prior learning. It would be difficult to believe that some of the more apt to teach of any generation would not have capitalized upon such a program in presenting to an apprentice …

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Flow Over A Rough Porous Flat Plate With Surface Mass Transfer, Francis K. King Feb 1968

Flow Over A Rough Porous Flat Plate With Surface Mass Transfer, Francis K. King

Electronic Theses and Dissertations

A wind tunnel was designed by the author for studying the aerodynamic properties of porous plates; it was constructed and installed in the Heat Power Laboratory, Mechanical Engineering, South Dakota State University. With a total pressure tube, the velocity profile throughout the boundary layer and the average shear stress at the wall were determined. A Preston tube was used to measure-local shear stress. There are only limited experimental data available on the relation between roughness and shear stress for flow over porous surfaces with injection or suction. Because of instrumentation problems, it proved difficult to obtain data in the sublayer. …

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A Survey To Determine The Extent Of Retraining In The Printing Industry, Robert A. Timmons Feb 1968

A Survey To Determine The Extent Of Retraining In The Printing Industry, Robert A. Timmons

Electronic Theses and Dissertations

No longer is the printing industry tied to the traditional concept of placing ink on paper; it is expanding to include electronic means for transmitting graphic information Sophisticated electronic systems and tape operations are ginning to replace older systems Computers are becoming increasingly significant in the areas of typesetting, presswork and estimating. The introduction of electronics in the graphic arts has brought about new systems such as facsimile transmission of finish pages of copy from city to city. Devices such as electronic etching and color separating equipment and electronic controls for highly mechanized bindery equipment are now being used. Electronic …

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Isolation And Characterization Of Fecal Streptococci From Surface Waters In South Dakota, Jerome Edward Tiede Jan 1968

Isolation And Characterization Of Fecal Streptococci From Surface Waters In South Dakota, Jerome Edward Tiede

Electronic Theses and Dissertations

Organisms referred to as "fecal streptococci" or "enterococci" have been studied as possible indicators of pathogenic bacteria of fecal origin since their· discovery. In Bergey's Manual of Determinative Bacteriology (1957), the "enterococci" are classified as Streptococcus faecalis, Streptococcus faecalis var. liquefaciens, Streptococcus faecalis var. zyrnogenes and Streptococcus durans. Streptococcus bovis and Streptococcus equinus do not meet all the criteria of the enterococcus group. However, they are found in great numbers in certain fecal material. These organisms, and the”enterococci" are collectively referred to as "fecal streptococci." The unavailability of satisfactory methods and of selective media has prevented the acceptance of these …

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Effects Of Supplemental Lysine In The Drinking Water Of Growing And Finishing Swine, Aaron R. Taylor Jan 1968

Effects Of Supplemental Lysine In The Drinking Water Of Growing And Finishing Swine, Aaron R. Taylor

Electronic Theses and Dissertations

Proteins are defined as organic compounds formed as polymers of amino acids. The structural characteristics of the individual proteins enable them to act as catalysts (enzymes) and thus control the rate of all biological reactions, to serve as carriers for biologically important substances in the organism, to regulate physiological relationships as hormones, and to serve as structural components for subcellular, cellular and other organic substances. Previous research has indicated that for optimum utilization of amino acids to occur the required amino acids must be present at the site where synthesis of the organic substances takes place. These required amino acids …

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The Field-Effect Transistor As A Mixer, Garald C. Sundberg Jan 1968

The Field-Effect Transistor As A Mixer, Garald C. Sundberg

Electronic Theses and Dissertations

The objective of this dissertation is to analytically and experimentally investigate the field-effect transistor as a mixer. The areas of study undertaken are: 1. Analysis of the parameters affecting mixing action. 2. Static-bias potentials for optimum mixing. 3. Conversion noise figure. This area also involves the correlation between amplifier and mixer noise factors. 4. Cross-modulation distortion. 5. High frequency mixing.

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Varsity Coaches' Methods Of Organizing Football Practice Sessions In The Public High Schools Of Wisconsin, James Harvey Steinberg Jan 1968

Varsity Coaches' Methods Of Organizing Football Practice Sessions In The Public High Schools Of Wisconsin, James Harvey Steinberg

Electronic Theses and Dissertations

The purpose of this study was to survey head varsity football coaches to determine common methods of organizing practice sessions of successful football coaches, to compare their methods with those of unsuccessful coaches, and to disclose differences in methods used by coaches in three stratums of high school populations. The following areas were investigated: elements pertaining to individual coaches, patterns of organizing practice sessions, attitudes towards practice sessions, and off-season activities of coaches. 1he data obtained were placed into groupings of coaching records, more or less successful. Also, the data were placed into-three stratums of high school populations and years …

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Academic Achievement In A Traditional School And An Innovative School, George Heaton Jan 1968

Academic Achievement In A Traditional School And An Innovative School, George Heaton

Electronic Theses and Dissertations

Interest in the process of change is not by any means new, but contemporary interest is at an all time high. Why is this true? What circumstances and factors make this interest in change one of the major national issues today? Much of the concern is the -result of the increasing gap between what is known about good educational theory and what is really happening in classrooms. This gap between good educational theory and actual happening in the classroom has always existed and no one is suggesting that it can be completely eliminated. However, is it possible to close part …

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Analysis Of Two Granular Pesticide Applicators For Experimental Plots, Gerald Albert Stangl Jan 1968

Analysis Of Two Granular Pesticide Applicators For Experimental Plots, Gerald Albert Stangl

Electronic Theses and Dissertations

Pesticides are applied to agricultural crops to maximize returns on the investment by the farmer. Granular pesticides are replacing liquid sprays in many applications. Granules are composed of a sorptive, inert carrier material impregnated with a toxicant which is released when the granules contact water. Application of pesticides by granular carrier has numerous advantages over liquid application: 1. Ease of handling and of application as no mixing or addition of water is necessary in the field. 2. Less drift because of particle weight, and thus reduced operator exposure to toxic chemicals. 3. Less total weight applied (10 to 20% of …

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Reaction And Response Time Of Football Players As Affected By An Audible Change Of Play, Edward Paul Finn Jan 1968

Reaction And Response Time Of Football Players As Affected By An Audible Change Of Play, Edward Paul Finn

Electronic Theses and Dissertations

The purpose of this study was to determine the effects of audible plays at the line of scrimmage on reaction and response time of college football players, in carrying out selected offensive assignments correctly. The subjects included sixteen experienced football players from the 1967 freshman and varsity football teams at South Dakota State University. A total of 240 reaction times and 240 response times were measured. Each subject was tested with eight audible and eight nonaudible play sequences. Three practice trials were given before testing each individual. Errors were recorded, and the trials in which they occurred were repeated. The …

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Study Of Maintenance Deficiencies, Operating Horsepower, Fuel Efficiency, And Pump Efficiency Of Internal Combustion Engine Powered Pumping Plants, George Robert Durland Jan 1968

Study Of Maintenance Deficiencies, Operating Horsepower, Fuel Efficiency, And Pump Efficiency Of Internal Combustion Engine Powered Pumping Plants, George Robert Durland

Electronic Theses and Dissertations

The transition of sugar beet production from Western South Dakota to the southeastern area of the state, in 1964 and 1965, brought many changes in cropping practices. These changes occurred in the preparation of the seedbed, the seeding process, cultivation practices and methods of har�esting. The farmers, who switched to beet production, in this area were confronted with cropping practices that were completely foreign to them. They were offered assistance by Sugar Beet Company fieldmen, Cooperative Extension personnel and South Dakota State University research personnel. With an experienced background in sugar beet production, the company fieldmen were able to direct …

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An Explosive Weight-Training Program And Its Effect Upon The Leg Power On Nonwrestlers And Their Performance Times Of Three Selected Wrestling Maneuvers, Douglas Jay Dufty Jan 1968

An Explosive Weight-Training Program And Its Effect Upon The Leg Power On Nonwrestlers And Their Performance Times Of Three Selected Wrestling Maneuvers, Douglas Jay Dufty

Electronic Theses and Dissertations

The purpose of this study was to determine the effect of an explosive weight-training program on the leg power of nonwrestlers and their performance times of three selected wrestling maneuvers. Twenty-four male freshman nonwrestlers enrolled in a basic physical education wrestling class participated in the study which lasted fourteen weeks. After being taught the long sit-out the takedown drop, and the stand-up wrestling maneuvers, the subjects were equated in an explosive weight-training group and a nonweight-training group on the basis of their explosive leg power test scores. For twenty sessions, the weight-training group participated in an explosive weight-training program involving …

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Modular Scheduling As Related To The Physical Education Program In Secondary Schoolsmicroform, Dale Allen Schmuck Jan 1968

Modular Scheduling As Related To The Physical Education Program In Secondary Schoolsmicroform, Dale Allen Schmuck

Electronic Theses and Dissertations

The purpose of this study was to survey physical education teachers who have taught under modular scheduling in order to determine whether or not differences exist between teachers' reactions of three strata (size of school studied) as they relate to the physical education teacher, the physical education program, and the organization of that program. The following areas were studied: (1) large-group instruction; (2) small-group discussion; (3) laboratory periods; (4) team teaching; (5) individual and independent study; and (6) teachers' opinions of techniques employed under modular scheduling. The following procedure was employed: Three hundred thirty questionnaires were sent to physical education …

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A Survey To Determine If A Positive Correlation Exists Between Cost Of Production And Rates Charged For Advertising Space In South Dakota Weekly Newspapers, Harry D. Dawson Jan 1968

A Survey To Determine If A Positive Correlation Exists Between Cost Of Production And Rates Charged For Advertising Space In South Dakota Weekly Newspapers, Harry D. Dawson

Electronic Theses and Dissertations

This study will be concerned with advertising income and production expense of South Dakota weekly newspapers from the standpoint of a justified advertising rate. From published advertising rates and expense data received from individual South Dakota weekly newspaper publishers, the author will endeavor to establish an average rate charged per unit of advertising and compare it with an average cost-of producing that unit.

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Some Factors Influencing Fungicide Control Of Leaf Rust And Stem Rust Of Wheat, Gilbert Eugene Cook Jan 1968

Some Factors Influencing Fungicide Control Of Leaf Rust And Stem Rust Of Wheat, Gilbert Eugene Cook

Electronic Theses and Dissertations

Stem rust, Puccinia graminis tritici Eriks. and Henn., and leaf rust, Puccinia recondita Rob. Ex Desm., destroyed an estimated 70% of the South Dakota winter wheat crop in 1962, a loss of more than 12 million bushels valued at $24 million (30). Similar losses have occurred periodically in South Dakota. Breeding programs have produced resistant varieties of spring and winter wheat; however, new races of rust have developed and attacked varieties heretofor resistant. For example, untiI 1952, the spring wheat varieties Pilot, Rival, and Mida were resistant to stem rust race 56, which had been the most prevalent race in …

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Describing Function Analysis Of The Field-Effect Transistor Oscillator, Edward C. H. Chang Jan 1968

Describing Function Analysis Of The Field-Effect Transistor Oscillator, Edward C. H. Chang

Electronic Theses and Dissertations

Recently, due to advances in fabrication techniques, it has become possible to manufacture field-effect transistors having electrical properties which make them very attractive for circuit applications. In the bipolar transistor both positive and negative free carriers take part in the functioning of the device; hence the name bipolar. On the other hand, in unipolar devices, the current is carried only by the free majority carriers in the conducting channel and no essential role is played by the small number of minority carriers; hence the name unipolar. The purpose of this paper is to study the applicability of the describing-function method …

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Genetic Parameters Among Production, Carcass Composition And Carcass Quality Traits Of Beef Cattle, Darrell A. Busch Jan 1968

Genetic Parameters Among Production, Carcass Composition And Carcass Quality Traits Of Beef Cattle, Darrell A. Busch

Electronic Theses and Dissertations

There were 1,642,000 beef cows in South Dakota on_ January 1, 1967, which was 14 percent higher than the 1961-65 average (South Dakota Crop and Livestock Reporting Service, 1967). These cows were valued at $307, 054, 000, a 27 percent increase over the 1961-65 average. There were 390, 000 head of cattle and calves on feed on January 1, 1967, a 33 percent increase over 1961 and a 22 percent increase over the 1961-65 average. The sale of cattle and calves has accounted for 44 percent of the cash farm income in South Dakota for the period 1958-65 and is …

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A Gravel Envelope For A Tile Drain In A Coarse Silt Base Material, Dale A. Bucks Jan 1968

A Gravel Envelope For A Tile Drain In A Coarse Silt Base Material, Dale A. Bucks

Electronic Theses and Dissertations

In recent years, drainage has been recognized as essential to the development of a large-scale irrigation project. South Dakota is now planning for the irrigation of approximately one-half million acres of land through the proposed Oahe Irrigation Unit located in the northeastern part of the state. There are two main bodies of land in the Oahe Unit – the Lake Plain area which is the postglacial “Lake Dakota” and the larger portion of the project, and the Missouri Slope Area which is part of the Great Plains province lying east of the Missouri River. A large percentage of this project’s …

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An Experimental Investigation Into The Effect Of Density Of Ink Film Thickness On Dot Area Changes On An Offset Press, Jon Ralph Braswell Jan 1968

An Experimental Investigation Into The Effect Of Density Of Ink Film Thickness On Dot Area Changes On An Offset Press, Jon Ralph Braswell

Electronic Theses and Dissertations

One of the biggest difficulties in the evaluation and control of high quality printed reproductions arises from the fact that no matter how carefully the halftones and tints are made, there is no assurance that their dot areas and densities will be faithfully reproduced on the printed sheet. Image size can be changed in platemaking, contacting or presswork. Assuming that the image or original dot areas get to the press unchanged by intermediate steps, there are still several variables which can affect the image areas on the press. The ink film thickness can either cause slur or spreading of small …

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An Evaluation Of The Novels Of Mari Sandoz, Marian Barnes Jan 1968

An Evaluation Of The Novels Of Mari Sandoz, Marian Barnes

Electronic Theses and Dissertations

Mari Sandoz’ is an established Nebraskan writer; she is known primarily for her biographical and historical books. So recognized is Mari Sandoz as a Nebraska author that the governor of Nebraska proclaimed August 23, 1954, “Mari Sandoz Day” in honor of the publication of The Buffalo Hunters.1 But Miss Sandoz has been recognized beyond the confines of her own state. Old Jules, the biography of her father, won the Atlantic Monthly Press non-fiction award in 1935. In 1959, Mari Sandoz received the Buffalo Award of the New York Posses of the Westerners for The Cattlemen. Her books have been published …

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Limnology Of Selected South Dakota Lakes, Artwin E. Schmidt Jan 1968

Limnology Of Selected South Dakota Lakes, Artwin E. Schmidt

Electronic Theses and Dissertations

Physical, chemical, and biological aspects of 45 lakes in South Dakota were studied from July 1965 to July 1967. Maximum water temperature at the surface reached 28 C. Most of the lakes studied exhibited continuous circulation except when ice covered. Thermocline formation was observed in six of the lakes. Light transmission was influenced by turbidity, and varied greatly within individual lakes and among lakes. Dissolved oxygen concentrations ranged from near saturation to less than the recommended minimum for fish life. All likes studied were basic ranging from a pH of 7.1 to 11.3. Specific conductance of lakes occupying open basins …

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Fishes Of The Big Sioux River, James A. Sinning Jan 1968

Fishes Of The Big Sioux River, James A. Sinning

Electronic Theses and Dissertations

An understanding of the fishes and limnology of a river is essential to the effective management of the river. The climate, soils, and agricultural practices in eastern South Dakota create unusual characteristics in rivers draining that area. One of the principal rivers of the area is the Big Sioux River. Fishes of this river were first studied about 1900 by Meek and by Everman and Cox (Bailey and Allum, 1962). A later survey by Churchill and Over (1933) apparently included the Big Sioux River, but collection data were inadequate for detailed comparisons. Since that time collections of fishes were made …

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A Study Of Some Physico-Chemical Changes In A Spread-Type Dairy Product During Storage, Alfredo E. Gudeikis Jan 1968

A Study Of Some Physico-Chemical Changes In A Spread-Type Dairy Product During Storage, Alfredo E. Gudeikis

Electronic Theses and Dissertations

In the Dairy Science Department at South Dakota State University a new dairy spread product has been developed which has only 50% of the fat content of butter or margarine and 60% of the calorie value of the higher fat products. It is increased in solids content with nonfat milk solids. The purpose· of developing this product was to obtain a new outlet for milk constituents; desirably it was to be one that could regain the market sales which were lost by butter and are now enjoyed by the margarines. The high price of butter compared with the substitute product …

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The Feeding Value Of High Dry Matter Corn Silage, Myers J. Owens Jan 1968

The Feeding Value Of High Dry Matter Corn Silage, Myers J. Owens

Electronic Theses and Dissertations

The important of corn in dairy cattle feeding is generally acknowledged. A popular way of preserving the crop is to make corn silage, thus using the whole plant for feed and preserving maximum feed per acre. The increased utilization of corn silage by dairymen may be due to its high energy yields per acre, high acceptability by cattle, and ease with it is incorporated into automated systems of harvesting and feeding. The increasing importance of corn silage in the United State is evidenced by the increasing acreages harvested as corn silage. In 1950 there were 4,937,000 acres planted with a …

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The Mechanism Of Alkyl Migrations In Nitrogen Ylids, Wesley J. Bruxvoort Jan 1968

The Mechanism Of Alkyl Migrations In Nitrogen Ylids, Wesley J. Bruxvoort

Electronic Theses and Dissertations

The purpose of this research is to study the mechanism of alkyl migration in nitrogen ylids. There are several possible mechanisms by which the migration may take place. A. The alkyl group, R, may migrate intermolecularly. During the migration the R group would exist as a free carbonium ion separated from the parent molecule by solvent. B. The alkyl group remaining in the same plane during the migration. Isomers would not be expected because of the facile inversion about the nitrogen atoms. C. The alkyl group, R, may migrate both cis and trans, through a concerted mechanism. The alkyl group …

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A Historical Analysis And Comparative Classification Of The Use Of Computers In The Typographic Industry, Harvey R. Levenson Jan 1968

A Historical Analysis And Comparative Classification Of The Use Of Computers In The Typographic Industry, Harvey R. Levenson

Electronic Theses and Dissertations

Although developments of the past several decades confirm a revolutionary expansion of graphic arts technology, the printing industry has traditionally been known for its lack of technological progress. It is frequently stated that printing techniques, until recently, were considered to be approximately 50 years behind other industries with regard to technological advancement. Such conditions were particularly true in the area of typesetting. To witness the unprogressive implements being used, all one had to do was visit a typica1 composing room entangled with the awkward mechanisms of conventional Linotypes, Intertypes, and other similar typesetting devices. Such composing systems are steadily becoming …

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