Engineering Commons^™

Bearing Capacity Of Surface Footings On A Sand Layer Resting On A Rigid Rough Base, Tom Walter Pfeifle

Electronic Theses and Dissertations

The purpose of this study is to present the results of some recent laboratory model testing on the ultimate vertical load carrying capacity of rough, rectangular, surface footings which were placed on granular soil. A rigid base was located at limited depths. It is expected that these results will lend to a better quantitative understanding of the problem.

Treatment Capabilities Of A Rapid Infiltration Pilot Unit Treating Stabilization Pond Effluent, Richard G. Seas

Electronic Theses and Dissertations

In October, 1972, Congress passed PL 92-500, "Federal Water Pollution Control Act Amendments of 1972 1; which is designed to upgrade the quality of the nation's water. The act requires the formulation of effluent standards that would require use of “best practicable treatment”. The effluent standards are to require use of the "best available" technology by July 1, 1983 (1). PL 92-500 requires the Environmental Protection Agency Administrator to publish information explaining which treatment techniques may be used to meet the requirement of "best practicable treatment". Land application of wastewater has been designated as a viable alternative to traditional treatment …

An In-Plant Waste Survey Of An Egg-Processing Plant, James R. Schultz

Electronic Theses and Dissertations

The total number of eggs produced.in the United States has increased from 40 billion in 1940 to approximately 70 billion in 196 7 (1-265). It is expected that the demand for processed eggs will increase from ten percent of the total production in the 1960's to over 30 percent in the 1970's (2-805). The increase in use of processed eggs will undoubtedly result in an increase in production wastes. To estimate the water pollution potential of egg wastes and to provide the information necessary for procurement of waste discharge permits, knowledge of the volume, strength and treatability of egg-processing wastes …

Application Analysis Of A Cellular Geographic Information System, Michael Edward Wehde

Electronic Theses and Dissertations

AREAS, the Area REsource Analysis System, was developed by the author as an analytical tool for resource data manipulation in a spatial context. The data base and processing software design factors relevant to economical application are reviewed. The investigation seeks to define a procedure for selection and justification of the grid cell size used to quantify the spatial domain. The performance of a cellular information system is measured in terms of mapping and inventory accuracy. These measures of performance are evaluated for various cellularizations of a single map. The interboundary distance distribution is justified as the only unique characterization of …

The Effect Of Potassium Permanganate On The Removal Of Iron And Manganese From Ground Water, Mohammad Reza Farvardin

Electronic Theses and Dissertations

For the past three years or so, a gradual migration of iron and manganese deposits has been observed in the water mains to the west of the East Water Treatment Plant of Brookings, South Dakota. These deposits have been gradually migrating further westward from the plant (8). Routine analyses of the treated water from the East Plant indicate that the iron and manganese levels are within the USPHS recommended limits (9). Consequently, conclusive evidence that this plant is the source of the problem does not exist. However, the analyses are normally conducted on samples collected shortly before backwashing the filters. …

Discharge Measurement And Energy Efficiency Evaluation Of Irrigation Pumping Plants, Bruce A. Jennings

Electronic Theses and Dissertations

No information has been available regarding efficiencies of electric irrigation pumping plants in South Dakota. Pumping plant discharge, a key parameter in the calculation of pumping plant efficiency, is often difficult to measure in the field. A project was initiated at South Dakota State University in 1976 to investigate field pumping plant efficiencies. The following objectives were established for the project. 1. To investigate various methods of measuring irrigation pumping plant discharge. 2. To develop a suitable field procedure for determining electric irrigation pumping plant efficiency. 3. To measure energy efficiency of selected electric irrigation pumping plants in South Dakota.

Torsional Vibrations Of A Composite Elastic/Viscoelastic Cylindrical Shaft, Deepak Kumar Mullick

Electronic Theses and Dissertations

The primary objective of this research is to analyze the torsional vibrations of a composite bar, and the parameters associated with the vibrations. The ultimate goal in this study of vibrations is to determine their effect on the performance and safety of the system under consideration.

Audio Triamplification System., John James Mccure

Electronic Theses and Dissertations

This thesis is for the purpose of determining if active filters are useful as audio crossover networks and in particular if they are better than passive crossover networks. An entire audio reproduction system was constructed with the express design intent of linear operation in two separate modes. These two modes being, first, a conventional single power amplifier passive crossover system, and second, an active filter triamplification system. Both systems were subjected to three different objective tests and one subjective test. The subjective testing included a wide spectrum of listeners ranging from rank amateurs to highly trained recording and mixing engineers. …

Performance Of A Diurnally Tracking Solar Energy-Intensifier, Calvin E. Siegel

Electronic Theses and Dissertations

The United States agricultural system provides numerous opportunities in which solar energy can be utilized. Low to moderate temperature rise collectors can provide a large percentage of the energy requirements normally met by using high quality fossil fuels. As world demand for food production increases due to a growing population, alternative sources of energy need to be developed and applied as substitutes for these increasingly scarce fossil fuels. Agriculture offers practical advantages for the use of solar heat energy because there exists sufficient area for solar collectors and a wide range of temperature applications on most farmsteads. Demand for energy …

Drip And Sprinkler Irrigation Of Carrots And Onions, James D. Melstad

Electronic Theses and Dissertations

Many specialty crops, especially vegetables, are shallow rooted and sensitive to periods of moisture stress. This makes irrigation of vegetables necessary to their production in South Dakota since summer rainfall is normally both inadequate and undependable. A study was initiated in conjunction with the South Dakota Agricultural Experiment Station and the Water Resources Institute to evaluate irrigation of specialty crops in eastern South Dakota. Drop and sprinkler irrigation were utilized for the irrigation of two specialty crops presently grown in South Dakota, carrots and onions. The study was initiated with the following objectives: 1. To compare carrots and onion yields …

Viscoelastic Cylindrical Pressure Vessel With Variable Inner Radius, A. N. Joshi

Electronic Theses and Dissertations

The objective of this thesis is to predict from a theoretical basis the stress redistribution processes occurring within the viscoelastic core of a cylindrical pressure vessel reinforced by an elastic casing around the outer perimeter, and subject to internal pressure applied to the time-dependent inner boundary of the cylinder. The problem so stated requires development of a new technique leading to a solution for a mixed boundary value problem for a viscoelastic body occupying an ablating cylindrical y-shaped region. The approach taken in this thesis consists in reduction of a governing integro-differential equation to an equivalent set of algebraic equ3tions …

Integrated Numerical Simulation Of Drip Irrigation With Subsurface Drainage, James Ray Hoover

Electronic Theses and Dissertations

A numerical method and model were developed to simulate soil moisture during steady-state and transient flow toward a tile drain. Intermittent application of water by drip irrigation and rainfall were simulated by use of finite difference approximation equations. No known analytical solution for these flow situations exists because of the complex mathematics describing unsaturated flow in the soil. The computer model is based on the electrical resistance network analog. The explicit finite difference equations were solved by the successive over-relaxation method for steady-state flow and by iteration for transient soil moisture flow. The computer program for the model consists of …

Long-Term Retention Of Tritium In Man, Chin-Jen Ou

Electronic Theses and Dissertations

[No abstract provided.]

The Unsteady Circulation Distribution In Rotors And Its Application To Noise Studies, Assem A. Fathy

Electronic Theses and Dissertations

A new method for the calculation of the unsteady circulation distribution in axial flow compressors was developed. The classical assumption of representing the rotor by a two-dimensional infinite cascade was eliminated. Instead the more realistic case of a radial cascade with blades of finite length was studied. The blades were assumed to be thin and only slightly cambered. The flow was assumed ·to be incompressible and inviscid and the secondary flow effects were neglected. The velocity induced at an arbitrary point of a reference blade due to the bound vortices on the blade under consideration and the other blades and …

Quantification Of Pollutants In Surface Runoff From Agricultural Lands In Brookings County, South Dakota, Leland Lester Harms

Electronic Theses and Dissertations

Surface runoff from snowmelt and rainfall was measured 1n eastern South Dakota from seven sites (7.18 to 18.69 acres) during 1971 and 1972. All sites had single crops which included corn, oats, pasture and hayland. All land was farmed under normal farming conditions. Samples were taken periodically throughout each runoff event, and a single composite sample was made from the individual samples for a particular site. The composite sample represented the entire runoff event. The amount of rainfall and the runoff flow were measured. Determinations on the composite sample included total coliform, fecal coliform, fecal streptococcus, soluble pesticides, specific conductance, …

Evaluation Of Bi-Level Drainage Theory With A Viscous-Flow Analog, James Marfred Kienholz

Electronic Theses and Dissertations

The primary purpose of this study is to evaluate the validity of this bi-level theory with a viscous-flow analog. Viscous-flow analogs have been used by many investigators in the past to evaluate analytical solution to drainage problems (Bear, 1972). The objectives of this study are: 1. Design and construct a viscous-flow analog for laboratory and classroom use, 2. Test the reliability of existing bi-level drainage theory with the analog, and 3. Provide design data for use in the solution of bi-level drainage problems. The bi-level drainage theory will be graphically presented for design purposes provided the theory is shown to …

Experimental Study On Viscoelastic Properties And Fracture Characteristics In Polymers, Debaranjan Mohanty

Electronic Theses and Dissertations

The research reported in this thesis is undertaken with the following objectives:
1. To determine the viscoelastic properties of polymers on creep test under constant load;
2. To determine the internal friction (loss factor) of polymers under periodic loading condition;
3. To determine the delayed time or life time on fracture of the polymer under constant loading ; and
4. To verify the relationship, theoretically predicted, between the time to fracture and the material characteristics of the polymer with experimental observations.

An Incrementally Distributed Mathematical Model Of A Watershed, Charles Arnold Onstad

Electronic Theses and Dissertations

The utilization of distributed input parameters enables hydrologists to more adequately cope with watershed management problems. A distributed system aids in evaluating alternative solutions designed to alleviate a problem situation. As a result, the objectives of this study were (1) to develop a hydrological framework delineating the surf ace configuration of a watershed to consider parameter distribution; (2) to develop a model of hydrologic performance of a watershed using existing techniques and amenable to the physical framework; and (3) to demonstrate the versatility of the model using hypothetical data. The model versatility was demonstrated by showing the effects of different …

The Role Of Rainfall Impact And Surface Flow In Soil Detachment And Transport, Robert Alan Young

Electronic Theses and Dissertations

Soil erosion caused by rainfall is a very complex physical process. To evaluate the mechanism of erosion so that an assessment can be made of the extent to which it may be controlled necessarily begins with an understanding of the basic fundamental factors involved. The purpose of this study involves the development of an insight of the relative importance of the roles played by various contributors to the erosion process. Particular emphasis is placed on the contribution of rainfall detached soil to total soil loss. Three soil types, Barnes loam, Crofton silt loam and Central sandy loam, were prepared with …

A Simulation Of Sediment Deposit In Open Channels, Tsan-Wen Wang

Electronic Theses and Dissertations

In this study, two mathematical models have been developed to simulate sediment deposition in open-channel flow; a model based on three characteristic equations and a model based on two characteristic equations. A set of three partial differential equations for one dimensional transient flow with homogeneous density was provided to explain the mechanics of the phenomenon. By the method of characteristics, three partial differential equations were transformed into a set of three ordinary differential equations or a set of two ordinary differential equations by simplification in which the change of sediment layer thickness with respect to distance was assumed to be …

Analysis Of Variation Of River Flow And Water Quality In The White River Basin, Michael Stephen Thompson

Electronic Theses and Dissertations

The main objectives of this White River Basin study were to analyze flow variation records, to investigate existing river water quality data as compared with the designated beneficial uses for the basin and to consider the influence of present and future irrigation development. Data were collected from a number of sources and brought together for interpretation with respect to these objectives. The streamflow study utilizes the streamflow records from 10 gaging stations in the White River Basin. It is expected that the results of this investigation may be of assistance to the South Dakota Water Resources Commission and the South …

Computer Simulation Of Unsteady Flow In An Alluvial Channel By The Method Of Characteristics, Dennis Lynn Richards

Electronic Theses and Dissertations

A number of dams have been constructed along alluvial rivers. These dams create reservoirs which serve to collect and store water, usually in large quantity, for use in supplying municipal needs, for supplying power and driving machinery, for furnishing irrigation, and for retaining the flow in time of floods. The characteristics of flow and the sediment-transport capacity of the channel change after these dams have been constructed. One of the major problems then confronting the hydraulic engineer is the rate of reservoir sedimentation and the change in river configuration. A problem of concern is the rapidity of reservoir sedimentation and …

Experimental Investigation Of Shock Boundary Layer Interaction For Two-Dimensional And Axisymmetric Flow, A. Shawki Zahran

Electronic Theses and Dissertations

A supersonic wind-tunnel has been constructed using an 8 inch by 10 inch single stage jet vacuum ejector with a capacity of handling 0.4 lb/sec air at 4 inches Hg absolute suction pressure. A Toepler Schlieren system with 10-inch diameter parabolic mirrors has been set up for flow pattern visualization. The same apparatus was developed to obtain multi-colored views of the flow pattern. That was accomplished by placing an equilateral prism in front of the light source located at the focal plane of the first parabolic mirror. A spectrum was thus produced at the focal plane of the second parabolic …

Screening Electrocardiograms Using Hotelling's Method Of Principle Components, Edward G. Schwartz

Electronic Theses and Dissertations

Considerable use is presently being made of computers to classify electrocardiograms (ECGs) into various heart defect categories. An example of such a program is the "Electrocardiographic Analysis Program" developed jointly by the Mayo Clinic and IBM. In one of Dr. Caceres published reports, he tells of using a computer program which involves 5,000 instructions. Dr. Caceres does not say whether this is a commercial program or one of bis own. His description does place this program in the same general category as IBM's. These programs have the common criteria of examining the ECG for the same information that a cardiologist …

An Evaluation Of An Aerated Lagoon System Treating Combined Dairy And Domestic Wastes During Summer Operation, Douglas M. Skie

Electronic Theses and Dissertations

The Water Quality Act of 1965 and the adoption of the subsequent state water quality standards emphasized the general public's concern for the control of water pollution; for it has become the goal of our nation to maintain all American waters in a suitable condition for domestic and industrial supply, for recreation and for other beneficial uses. It is for these reasons that many communities have been faced with the problem of constructing new sewage treatment facilities or expanding present operations. The use of stabilization ponds as a means of providing sewage treatment has been the practice of many small …

Design And Construction Of Earth Dams., Panthragadi Bhyravamurthy

Electronic Theses and Dissertations

This thesis deals with the design and construction of rolled-fill earth dams with the standard methods of practice, taking the Hirakud Dam as the basis. The field operations of the investigation to obtain observational information and to secure samples for the laboratory testing include observation of rain gauge and river gauge readings, taking river water samples, digging test pits, drilling grout holes, opening drifts, digging borrow pits and conducting detailed topographical surveys. Laboratory tests are conducted on the samples and the results are plotted in graphs. Rainfall and run-off statistics are plotted in graphs. Observational information of geology is plotted …

The Separation Of Zirconium And Hafnium By Distillation : Ii. An Engineering Appraisal Of Aluminum Structural Materials., Everard G. Baker

Electronic Theses and Dissertations

A compilation of references dealing with the separation of hafnium and zirconium is presented, together with an evaluation of their possibilities. It is concluded that a distillation procedure holds the greatest promise. The theory of the separation of hafnium and zirconium by distillation of suitable compounds is given and experimental investigations are presented for confirmation.

A Thermometer Technique For The Determination Of Emissivities Of Finishes., N. P. Shah 1923-

Electronic Theses and Dissertations

Two thermometer techniques for the determination of emissivities of surface coatings are presented. One procedure involving the attainment of steady state hear transfer relations in coated thermometers placed through the wall of a duct at right angles to the direction of air flow was found to give consistent results. Another procedure based upon the rate of change of thermometer temperature was found to give consistent results only with excellent control of air conditions. The emissivities of a variety of paints, varnishes and lacquers were determined for temperature range 90⁰ F. to 140⁰ F. using silver and black coatings for standardization. …

Newspaper Matrix Backing Techniques., Robert Roscoe Childs

Electronic Theses and Dissertations

The problem of developing suitable materials and techniques for the elimination of hand backing of mats was undertaken. A thermosetting resin of the resorcinol type, ad-mixed with 15 to 25 per cent short-fiber asbestos, was applied to the mats both as a paste and in the form of a partially cured resin sheet. Its use was discontinued since its inherent insulating properties and warpage were found to be undesirable.

After experimenting with several other backing materials and methods, the following procedure was concluded to be feasible:

(1) Spraying sodium silicate solution upon a sheet of blotting paper.

(2) Pressing the …

Semi-Micro Combustion, Solvent Extraction, And Oleic Acid Adsorption Of Synthetic Drying Oils : Part Ii., Isadore Nathan Cooperman

Electronic Theses and Dissertations

The rates of oxidation, solvent solubility, and oleic acid adsorption, of natural and synthetic drying oil films were studied by semi-micro analytical methods.

This thesis consists of three phases:

I. Ultimate analysis to determine the oxygen content of a film at specific time intervals.

II. Extraction of the films to determine their solvent solubility as a function of time.

III. Oleic acid adsorption to get a correlation of the structure of the film.

Seven materials were examined:

A. Glyceryl Trilinoleate

B. Pentaerythritol Tetralinoleate

C. Pentaerythritol Oleate

D. Pentaerythritol Oleic Acid Long Oil Alkyd

E. Dipentaerythritol Linoleate

F. Pentaerythritol Linoleate

Glyceryl …