Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Electronic Theses and Dissertations

Discipline
Institution
Keyword
Publication Year
File Type

Articles 31411 - 31440 of 35942

Full-Text Articles in Entire DC Network

Comparison Of South Dakota State University Graduates Of The Home Economics And Of Other Curricula With Respect To Family Living Variables, Janice Hofer Grimm Mar 1972

Comparison Of South Dakota State University Graduates Of The Home Economics And Of Other Curricula With Respect To Family Living Variables, Janice Hofer Grimm

Electronic Theses and Dissertations

Marriage and the family as we have known them in the past are currently undergoing greater change at a more accelerated rate than ever before in history. Many writers concerned with the family and social problems would lead us to wonder if marriage is disappearing. There is an increase in communal living, exchange of marriage partners, and "open" campus dormitories. The divorce rate has been climbing steadily for a number of years. But when one looks more deeply into communal life for example, it is discovered that the duration of communal living is generally about two years. A study done …

Go to article

Untrastructural Morphology Of Bovine Herpesvirus Infected Cells, Carol Ann Larson Mar 1972

Untrastructural Morphology Of Bovine Herpesvirus Infected Cells, Carol Ann Larson

Electronic Theses and Dissertations

Infectious bovine rhinotracheitis (IBR) virus has been shown to cause considerable economic losses in the South Dakota cattle industry. On the average, one in ten cattle abortions are caused by this virus. This amounts to approximately $250,000 lost each year by South Dakota cattlemen. There is no way of determining the economic loss due to the respiratory infections also caused by this virus. As is the case with most virus diseases, control requires extensive knowledge of its biological, physical and chemical properties. The present study was undertaken to determine the effect of IBR virus on the ultrastructure of a bovine …

Go to article

Comparative Analysis Of Numerical And Integral Methods For Calculating Turbulent Compressible Flow, Ronald James Greve Mar 1972

Comparative Analysis Of Numerical And Integral Methods For Calculating Turbulent Compressible Flow, Ronald James Greve

Electronic Theses and Dissertations

The calculation of boundary layer parameters requires knowledge of the turbulent shear which, with our present incomplete knowledge of turbulence, must rely on empirical relationships. Another well-known problem is the non-linearity of the boundary layer equations. Early calculations rely on the well-known Von Karman integral equations but with the advent of the large digital computers, finite difference methods are presently commonly used. For calculation of the incompressible boundary layer there are two popularly used methods. A comprehensive comparison of this type of approximate method assuming different velocity profiles is given by Taylor. The second is a purely numerical method using …

Go to article

The Stereochemistry Of 5-Chloromethyl-5-Methyl-2-Oxo-2-Phenoxy-1,3,2- Dioxaphosphorinan And The Reaction Of Phenoxide Ion With 2-Chloro-5-Chloromethly-5-Methyl-2-Oxo-1,3,2-Dioxaphosphorinan, Samuel Dean Larsen Mar 1972

The Stereochemistry Of 5-Chloromethyl-5-Methyl-2-Oxo-2-Phenoxy-1,3,2- Dioxaphosphorinan And The Reaction Of Phenoxide Ion With 2-Chloro-5-Chloromethly-5-Methyl-2-Oxo-1,3,2-Dioxaphosphorinan, Samuel Dean Larsen

Electronic Theses and Dissertations

The primary objective of the research outlined in Part One is to assign the stereochemistry of some phosphorus containing heterocycles. In order to avoid confusion over nomenclature, most of the compounds described in this thesis will be named as derivatives of the 1,3,2-dioxaphosphorinan ring. For compounds described in the Experimental section, the designation of cis and trans will be assigned according to the arrangement of the phosphoryl oxygen at position 2 in relation to the chloromethyl group at C-5. Axial (ax) and equatorial (eq) designations will also refer to the chloromethyl group at 5, unless otherwise stated. Thus, the axial …

Go to article

A Comparative Economic Analysis Of Representative Sprinkler Irrigation Systems In The Eastern Missouri Alope Area Of South Dakota, Ronald C. Graham Mar 1972

A Comparative Economic Analysis Of Representative Sprinkler Irrigation Systems In The Eastern Missouri Alope Area Of South Dakota, Ronald C. Graham

Electronic Theses and Dissertations

Sizable annual variation in agricultural production and income has long been an obstacle to long-range, agriculturally orientated economic planning and development in the Northern Great Plains states. Paramount as a cause of this obstacle is the inconsistency of crop yields primarily due to annual fluctuations, sometimes severe, in the quantity and seasonal distribution of rainfall. Irrigation is the logical solution for stabilizing agricultural production and income. The development of sprinkler irrigation has the advantages of little or no requirement for land-shaping and of allowing rather exact application of uniform quantities of water. As such it has been considered for some …

Go to article

The Role Of Agriculture In South Dakota's Economy : An Approach To Analysis, Mahlon George Lang Mar 1972

The Role Of Agriculture In South Dakota's Economy : An Approach To Analysis, Mahlon George Lang

Electronic Theses and Dissertations

Dependency of the state's economy upon the agricultural sector demands that economic research and public policy with respect to agriculture be based upon a more refined understanding of the magnitude and nature of the relationship between the farm and nonfarm economies. Ideally, the earliest stages of decision-making in government grow out of carefully developed research into the likely outcomes of alternative public policy decisions. At the macroeconomic level, such research requires a firm grasp of the complex chain of events which will occur as a result of changes in policy toward agriculture. At present, this chain of events is only …

Go to article

The Scheduling Of Patients In A Physician's Office, Viswanath Gowtham Mar 1972

The Scheduling Of Patients In A Physician's Office, Viswanath Gowtham

Electronic Theses and Dissertations

The objective of this investigation was to design a procedure by which an appointment scheduling system could be developed in which 75 percent of the punctual patients would be seen by the physician within fifteen minutes of their appointment tithes, and to test the system in an actual clinic situation. It was also decided that certain results would be tested for statistical significance. To devise an appointment system that would yield optimum benefits to the patients, to the physicians, and to the clinic as a whole, proper consideration must be given to the type of physician/patient interaction taking place in …

Go to article

Automatic Control Of A Closed Conduit Cutback Irrigation System, Richard E. Kraft Mar 1972

Automatic Control Of A Closed Conduit Cutback Irrigation System, Richard E. Kraft

Electronic Theses and Dissertations

The total supply of water on the earth today is about the same as it was thousands of years ago. It is estimated that by the year 2020, 1,380 billion gallons of water will be used every day to satisfy the needs of 468 million people in the United States. Priorities will therefore have to be established to allocate the limited supply of water among the alternative users. One criterion, based on an economic analysis of the user, for making the allocation decision is presented by Reynolds. Unfortunately, agriculture has been awarded a rather low priority level as compared to …

Go to article

Estimation Of Plant S And Zn Concentration By Soil Test Correlation, Douglas Darrel Koth Mar 1972

Estimation Of Plant S And Zn Concentration By Soil Test Correlation, Douglas Darrel Koth

Electronic Theses and Dissertations

Sulfur and Zn are two elements essential for plant growth. Deficiencies of these two plant nutrients occur commonly in many areas of the world. Zinc deficiency symptoms were noted in corn in South Dakota during the late nineteen fifties. In the summer of 1970, S deficiency symptoms appeared in corn (Zea mays L.) grown on sandy soils in Marshall County, South Dakota. Zinc deficiencies of corn occur more often when corn is grown on soils that are characterized by one or more of the following properties: sandy texture, low organic matter, severe past erosion, leveled for irrigation, high lime level, …

Go to article

A Study Of The Starting Effects Of Large Induction Motors, Basilio Gonzalez Mar 1972

A Study Of The Starting Effects Of Large Induction Motors, Basilio Gonzalez

Electronic Theses and Dissertations

A portion of this study analyzes the starting conditions of 5,000 HP motors connected to a 4,160-volt bus. The power to the motors is supplied through a transformer with a nameplate rating of 12/16/20/22.4 WTA, 115-4.16 kV. This study will include from one to five, 5,000 HP motors although the present installation consists only of two motors. The transformer may supply power for five motors running at a steady-state, full-load condition without exceeding the maxi mum power rating. The equivalent impedance of the 115 kV system has been determined from the short-circuit on the 115 kV side of the transformer. …

Go to article

Instructional Television In The Brookings, South Dakota, Elementary Schools, Jonell M. Kinyon Mar 1972

Instructional Television In The Brookings, South Dakota, Elementary Schools, Jonell M. Kinyon

Electronic Theses and Dissertations

This paper intends to determine if instructional television is widely used in the Brookings, South Dakota, elementary schools. It also attempts to determine what attitudes Brookings elementary teachers have about instructional television. Instructional television (ITV) is a modern-day teaching tool available and used in most schools. The cost to the individual school district is minimal after receiving sets have been purchased. Supplementary materials go with the programs and are available to the school from the public television station. A school may purchase any or none of the material it chooses. The advantages of instructional television are many, as will be …

Go to article

Determination Of Salmonella Species In The Big Sioux River And Development Of A Quantitative Most Probable Number Method, Myung Hyun Kim Mar 1972

Determination Of Salmonella Species In The Big Sioux River And Development Of A Quantitative Most Probable Number Method, Myung Hyun Kim

Electronic Theses and Dissertations

In recent years the pollution problems in rivers and lakes have forced the Federal Water Pollution Control Administration to issue requirements for minimum water standards for each State with an interstate stream. Since the Big Sioux River is an interstate river, studies are needed to determine its quality. According to the South Dakota Committee on Water Pollution, water pollution in South Dakota originates from agricultural, municipal, and industrial wastes. For the Big Sioux River, the municipal and meat-processing wastes are the important sources of pollution. Little is known of the sanitary bacteriological quality of rivers and lakes in South Dakota. …

Go to article

A Study Of An Innovative Program Designed To Aid In Meeting The Needs Of Disadvantaged Students In Florence, South Carolina, Theodore Howard Gasper, Jr. Mar 1972

A Study Of An Innovative Program Designed To Aid In Meeting The Needs Of Disadvantaged Students In Florence, South Carolina, Theodore Howard Gasper, Jr.

Electronic Theses and Dissertations

In many instances, students fail to adjust to the regular school situation and consequently drop out. To counteract this, Florence Public School District Number One, instituted a program titled "Special Vocational Education”, which is an attempt to meet the needs or what is termed the "disadvantaged students." This study is of utmost importance in that it is an investigation to determine whether or not this special program is keeping the majority of the enrolled disadvantaged students in school. It is also important to know the amount of growth in academic skills and social traits made by the students each year. …

Go to article

A Special Purpose Hybrid Computer, H. Ganesh Mar 1972

A Special Purpose Hybrid Computer, H. Ganesh

Electronic Theses and Dissertations

Electric heating of buildings and houses is becoming more and more competitive with conventional heating methods. A survey in the magazine, "Electrical World," indicates 29 million houses will be electrically heated by 1980 in USA. Ease of control, flexibility in operation, competitive tariff rates of electrical energy, and cleanliness are some of the major factors responsible for this new trend. Under certain special circumstances, even if electrical energy is more expensive, it may be preferred to conventional heating methods due to the above listed advantages. Because of these trends, electric utility companies involved in electric heating of buildings are faced …

Go to article

Utilization Of Encounter Groups In A Residence Hall, Robert Melville Keith, Jr. Mar 1972

Utilization Of Encounter Groups In A Residence Hall, Robert Melville Keith, Jr.

Electronic Theses and Dissertations

The research is focused on how to make residence hall living a more valid and relevant learning experience for the students. The physical arrangement of living areas in most traditional American residence halls is constructed with separate general living areas, i.e. wings. Since the residents of the wing are usually physically separated from the other wings, the individual wing becomes a relatively independent environment having living/interacting peculiarities all its own. The author of this research assumed that the individual wing is the most immediate dormitory influence on a resident. By concentrating a directed growth producing experience at the wing level, …

Go to article

Leg Strength, Leg Power, And Sprinting Speed As Affected By A Select Weight Training Program, Paul David Flynn Mar 1972

Leg Strength, Leg Power, And Sprinting Speed As Affected By A Select Weight Training Program, Paul David Flynn

Electronic Theses and Dissertations

In athletic activities, strength, speed, and power are important factors that determine how effective and efficiently an individual will perform. Present day coaches realize that in order to have championship athletes and teams, the individual athlete must have muscular strength, speed, and power sufficient to meet the challenges of prolonged strenuous practice and competition. Other things being equal, the faster and stronger man will be more effective in athletics than the slower, weaker man. Kirkley indicates that the use of weights for improving one's ability in various sports and games is now largely accepted by the world's leading coaches. The …

Go to article

Density, Viscosity, And Electrical Conductance Of Sodium And Potassium Hydroxide In Concentrated Aqueous Solution, Warren Lee Erdahl Mar 1972

Density, Viscosity, And Electrical Conductance Of Sodium And Potassium Hydroxide In Concentrated Aqueous Solution, Warren Lee Erdahl

Electronic Theses and Dissertations

There has been much work done in the area of measurement of properties of dilute solutions. As a result, various relationships describing these properties have been observed. The region over which these relationships apply is narrow and limited to solutions of very low concentration. Some attempts have been made to extend these relationships to regions of greater concentration, but only limited success has been achieved. Most attempts are limited by insufficient knowledge of the properties of the concentrated solutions. The purpose of this research is to look at various properties of concentrated aqueous sodium and potassium hydroxide solutions and their …

Go to article

An Expression Of Hybrid Vigor And A Characterization Of Callus Tissue Of Zea Mays L., Judy Winkler Johnson Mar 1972

An Expression Of Hybrid Vigor And A Characterization Of Callus Tissue Of Zea Mays L., Judy Winkler Johnson

Electronic Theses and Dissertations

It is theoretically possible to culture any tissue from any plant or animal, but little work has been done on the major grain crops, especially Zea mays, because they are monocotyledons and present special problems in tissue culturing because of their slow growth. This thesis reports an attempt to grow and redifferentiate callus tissue of corn. The objectives of the research were: (1) to test the ability of different inbred and hybrid corn varieties to form callus and (2) to characterize the callus cell ultrastructure. Since so much is known about corn on the genetic level, it is appropriate to …

Go to article

A Study Of Groundwater Degradation Resulting From Wastewater Treatment By Lagooning, Douglas Carl Jensen Mar 1972

A Study Of Groundwater Degradation Resulting From Wastewater Treatment By Lagooning, Douglas Carl Jensen

Electronic Theses and Dissertations

During the past quarter century, the utilization of lagoons as a means of waste treatment has increased dramatically. Communities which utilize this means of waste treatment tend to consider the sewage lagoon as providing complete or final treatment. Consideration was not given to problems caused by the treated waste after it was removed from the immediate environment. In the past few years there has been an increasing demand that the environment be protected, and the methods of waste disposal have come under scrutiny. It has been found that the elements causing eutrophication of lakes and reservoirs exist in substantial amounts …

Go to article

The Relationship Of Hitting Ability In Baseball To Selected Anatomical Measurements And Motor Responses, Larry Lester Edlund Mar 1972

The Relationship Of Hitting Ability In Baseball To Selected Anatomical Measurements And Motor Responses, Larry Lester Edlund

Electronic Theses and Dissertations

Batters in all classifications of baseball, whether on the little league level or on the major league level, consistently strive for hitting proficiency. They know that baseball games are won by scoring runs. Hitting is a very important part of baseball but even the best hitters fail more than sixty percent of the time to hit safely. An example of this problem is evident in surveying the averages of the batting champions of the National and American League. During the years of 1928, 1948, and 1968, the National League batting champions had averages of 387, .376, and .335, respectively, and …

Go to article

Physiological, Anthropometrical, And Self Concept Changes In Overweight College Women As Affected By Exercise And Voluntary Diet, Connie J. Edlund Mar 1972

Physiological, Anthropometrical, And Self Concept Changes In Overweight College Women As Affected By Exercise And Voluntary Diet, Connie J. Edlund

Electronic Theses and Dissertations

The purpose of this study was twofold: to analyze the effects of a combination exercise program and voluntary diet on selected anthropometric and physiological variables of overweight girls at South Dakota State University, and to determine if measurable changes in self-concept were evident. Hypothesis 1. In the selected anthropometric and physiological variables of overweight girls there is a significant. improvement as a result of participation in a voluntary diet and prescribed exercise program. 2. There is no significant measurable change in self concept of overweight girls as a result of participation in a voluntary diet and prescribed exercise program. Limitations …

Go to article

Tissue Ammonium Nitrogen In Sheep Tongue, Liver And Kidney Following Death By Ammonia Intoxication, Dale L. Jaquette Mar 1972

Tissue Ammonium Nitrogen In Sheep Tongue, Liver And Kidney Following Death By Ammonia Intoxication, Dale L. Jaquette

Electronic Theses and Dissertations

Urea was introduced as an economical nonprotein nitrogen source for ruminant animals. In the gastrointestinal tract, urea is hydrolyzed in the presence of bacterial urease to ammonia and carbon dioxide. The liberated ammonia is utilized by rumen microorganisms for amino acid synthesis. Ammonia not used by microorganisms diffuses through the gastrointestinal lining and is transported to the liver by blood, where enzymes synthesize urea by combining two moles of ammonia and one mole of carbon dioxide. The nontoxic urea is excreted by the kidney or secreted with saliva and other digestive fluids for recycling. Ammonia intoxication occurs when more ammonia …

Go to article

An Integrated Circuit Bch Cyclic Code Decoder, Rasik Desai Mar 1972

An Integrated Circuit Bch Cyclic Code Decoder, Rasik Desai

Electronic Theses and Dissertations

The work done in this paper was motivated by a project that the United States Bureau of Reclamation has initiated to implement certain communication and control requirements. The Colorado River storage project, under the Bureau of Reclamation, has a central power operations center at Montrose, Colorado, to serve as a computing and dispatch center for the surrounding power plants and substations. The requirement was to provide supervisory control facilities at the Montrose Center to control the encompassing substatior1s and power plants. Specifically, the project was to furnish the dispatch center at Montrose with a stored program, programmable master station, which …

Go to article

Manpower Training Programs In South Dakota : Socio-Economic Attributes Of Participants Associated With Training Outcomes, James W. Delong Mar 1972

Manpower Training Programs In South Dakota : Socio-Economic Attributes Of Participants Associated With Training Outcomes, James W. Delong

Electronic Theses and Dissertations

Because of the unemployment, underemployment, poverty and occupational opportunity problems experienced in South Dakota, it is appropriate that manpower programs currently operating in the State be studied. To maximize the potential benefits of these programs it is necessary to understand their structure, their purpose, their goals and their effects. Likewise, the extent of participation in the programs should be determined along with finding out what type of trainee is benefitting the least or the most from the training experience. There has been considerable research into a wide spectrum of manpower programs and manpower needs in urban areas; however, relatively little …

Go to article

Dung Beetle Population Fluctuations As Influenced By Ultra-Low-Volume Insecticides Aerially-Applied For Fly Control On Cattle, Ernest Sheridan Del Fosse Mar 1972

Dung Beetle Population Fluctuations As Influenced By Ultra-Low-Volume Insecticides Aerially-Applied For Fly Control On Cattle, Ernest Sheridan Del Fosse

Electronic Theses and Dissertations

Three organophosphate insecticides, viz. Ravap® (a 1:4 mixture of dichlorvos and Gardona® (2-chloro-1-(2,4,5-trichlorophenyl) vinyl dimethyl phosphate, Rabon® (2-chloro-1-(2,4,5-trichlorophenyl) vinyl dimethyl phosphate), and 95.0% malathion, were applied aerially at ULV rates for control of face flies, Musca autumnalis De Geer, and horn flies, Haematobia irrit.ns (L.), during the summers of 1971 and 1972. From pre- and post- spray counts of adult flies on cows it was determined that Ravap reduced horn flies and face flies 69.6% and 26.1% respectively, one day after application. One week after application, however, horn flies had increased 217.4% over prespray counts, and face flies had increased …

Go to article

United States Air Force Aero Club Management By Break-Even Analysis, Raymond Louis Davison Mar 1972

United States Air Force Aero Club Management By Break-Even Analysis, Raymond Louis Davison

Electronic Theses and Dissertations

The problem to be examined in this research effort is whether or not it is possible to provide aero club management with simple, effective, easily applied methods for making financial decisions which will make them self-supporting while meeting the flying demands of their members. The objectives of the study are: 1. Determine a satisfactory means for determining costs and charging flying rates to maintain aero clubs in a financially solvent status. 2. Determine the types of information needed to assist aero club management in achieving the first objective. The procedures developed and concepts employed for the Ellsworth Club model are …

Go to article

Sulfur And Methionine Supplementation With Urea For Feedlot Cattle, Bryan E. Davidson Mar 1972

Sulfur And Methionine Supplementation With Urea For Feedlot Cattle, Bryan E. Davidson

Electronic Theses and Dissertations

Protein is often a limiting nutrient in animal diets. As ruminant animals have the ability to convert large quantities of nonprotein nitrogen to protein, the cost of protein supplementation can be greatly reduced by substituting cheaper nonprotein nitrogen compounds in protein supplements for certain amounts of preformed protein. This process is mediated through rumen microorganisms and, to date, urea has been the most widely used nonprotein nitrogen compound in ruminant diets. Efficiency of urea utilization may be affected by several factors. Among these are level and source of energy, level and source of protein and percent urea in the total …

Go to article

Operation Of Induction Motor Open-Delta Transformer Banks, Gautam C. Das Mar 1972

Operation Of Induction Motor Open-Delta Transformer Banks, Gautam C. Das

Electronic Theses and Dissertations

Induction motors and transformers are among the earliest electrical equipment to be manufactured. The squirrel-cage induction motor has been studied very widely from the time of Tesla and Ferraris in 1889. The operation of a squirrel-cage induction motor with an unbalanced supply voltage has also been studied in great detail. Yet there is little mention of an induction motor operating on an open-delta or vee-connected transformer bank in textbooks. The open-delta transformer connection is the equivalent of the delta-delta connection with one transformer removed. The vee-connection is equivalent to a star-delta connection with one transformer removed; the primary neutral must …

Go to article

The Relationship Of Jump Shooting Ability In Basketball To Selected Measurable Traits, Donald F. Dahl Mar 1972

The Relationship Of Jump Shooting Ability In Basketball To Selected Measurable Traits, Donald F. Dahl

Electronic Theses and Dissertations

The game of basketball has undergone changes over the years and today it is a fast-moving game wherein all of the players have an opportunity to score. The very nature of the game indicates that accurate shooting is essential to the final outcome. Sharmin stated the obvious, that in basketball, the team which wins scores more points than its opponent, and “Accurate shooting is the backbone of the game." This idea is supported by Benington and Newall who stated that "The skill of shooting has probably developed more than any other aspect of the game of basketball." Part of the …

Go to article

The Physiological Effects Of A Season Of Intercollegiate Wrestling On Selected Fitness Measures, Charley Eugene Corle Mar 1972

The Physiological Effects Of A Season Of Intercollegiate Wrestling On Selected Fitness Measures, Charley Eugene Corle

Electronic Theses and Dissertations

Koll states that the purpose of weight reduction 'in wrestling is to make an individual a more efficient and effective competitor so that he can wrestle in a lower weight class. However, the author also states that it is essential the wrestler be at a weight at which he feels strong and his body can function at its greatest potential. A wrestler should "cut" to gain efficiency but should not try to make a predetermined weight without consideration of his ability to function at that weight. Because the process of weight reduction is an integral part of wrestling and because …

Go to article

First Prev Next Last