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Full-Text Articles in Engineering
Bearing Capacity Of Eccentrically Loaded Surface Footings On A Sand Layer Resting On A Rough Rigid Base, Roland Dale Maynard
Bearing Capacity Of Eccentrically Loaded Surface Footings On A Sand Layer Resting On A Rough Rigid Base, Roland Dale Maynard
Electronic Theses and Dissertations
The purpose of this investigation is to present the results of some recent laboratory model testing of the ultimate load carrying capacity of eccentrically loaded strip, surface footings on sand, with a rigid base located at varying depths. It is expected that these results will. lend to a better quantatative [sic] understanding of the problems encountered in these situations.
Ground Water Quality Variation At A Rapid Infiltration Land Treatment System Used For Tertiary Wastewater Treatment, Thomas W. Drake
Ground Water Quality Variation At A Rapid Infiltration Land Treatment System Used For Tertiary Wastewater Treatment, Thomas W. Drake
Electronic Theses and Dissertations
Based on the need to monitor nitrates because of the 1977 modifications, as well as upon the original EPA provisions for ground water monitoring, the studies reported in this thesis were initiated. The objectives of this investigation were as follows: 1. To monitor four wells within the influence of the rapid infiltration pilot units, as well as two control wells located beyond the influence of the units, to determine any substantial changes in ground water quality, which might be attributed to the rapid infiltration pilot unit operation; 2. To specifically examine the nitrogen data collected from the perforated drains in …
Comparison Of Theoretical And Experimental Results Pertaining To R-Curves In Low And High Ductility Solids, Rabindra Nath Dash
Comparison Of Theoretical And Experimental Results Pertaining To R-Curves In Low And High Ductility Solids, Rabindra Nath Dash
Electronic Theses and Dissertations
Existing linear elastic fracture mechanics and J-integral analyses are well suited for safety assessments of high-strength, low-toughness materials. These analyses apply only to the onset of crack growth, which is usually tantamount to crack instability and structural failure in that class of materials. However, this is not the case for the low-strength, high-toughness materials in which crack instability may be preceeded [sic] by extensive stable crack growth under rising loads. Here, a substantial margin of safety may exist even when the onset of crack growth is imminent. This thesis describes research leading to a ductile fracture-mechanics methodology designed to treat …
The Effect Of Potassium Permanganate On The Removal Of Iron And Manganese From Ground Water, Mohammad Reza Farvardin
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
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.
Bearing Capacity Of Surface Footings On A Sand Layer Resting On A Rigid Rough Base, Tom Walter Pfeifle
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
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 …
The Practicality Of The Caldwell-Lawrence Diagrams For Predicting Lime-Softened Water Quality, James A. Arndt
The Practicality Of The Caldwell-Lawrence Diagrams For Predicting Lime-Softened Water Quality, James A. Arndt
Electronic Theses and Dissertations
The objectives of the investigation were: 1.) to determine the validity of the Caldwell-Lawrence diagrams in predicting alkalinity, calcium, and pH values at various levels of lime addition of the softening process. 2.) to determine the practical application of the diagram for plant operators in daily operations and design engineers for design calculations. Throughout the investigation, primary consideration was given to the practical aspects of water treatment in terms of water sampled, methodology, and.statistical analysis of test results. Construction of the Caldwell-Lawrence diagrams is based on chemical equilibrium between the carbonic species and calcium and magnesium in water. The theory …
Performance Of A Diurnally Tracking Solar Energy-Intensifier, Calvin E. Siegel
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 …
Application Analysis Of A Cellular Geographic Information System, Michael Edward Wehde
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 …
Torsional Vibrations Of A Composite Elastic/Viscoelastic Cylindrical Shaft, Deepak Kumar Mullick
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.
An In-Plant Waste Survey Of An Egg-Processing Plant, James R. Schultz
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 …