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Articles 10261 - 10290 of 11607
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A Method For Obtaining Thermal Stresses In Composite Plates Caused By Transient Conduction, Chih-Tai Keng
A Method For Obtaining Thermal Stresses In Composite Plates Caused By Transient Conduction, Chih-Tai Keng
Electronic Theses and Dissertations
No abstract provided.
Pavement Evaluation By Deflection Bowl, Chen-Wu Lin
Pavement Evaluation By Deflection Bowl, Chen-Wu Lin
Electronic Theses and Dissertations
No abstract provided.
A History Of The Memphis Volunteer Fire Department, 1848-1860, James Boyd Jones
A History Of The Memphis Volunteer Fire Department, 1848-1860, James Boyd Jones
Electronic Theses and Dissertations
No abstract provided.
Surface Recycling Of Asphaltic Concrete Highway Pavements, Alfred Bridwell Crawley
Surface Recycling Of Asphaltic Concrete Highway Pavements, Alfred Bridwell Crawley
Electronic Theses and Dissertations
No abstract provided.
Audio Triamplification System., John James Mccure
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. …
A Survey Of Commercial Radio Managers' Attitudes Toward University Broadcast Graduates Entering Commercial Radio Marketing, Phil Ford Wier
A Survey Of Commercial Radio Managers' Attitudes Toward University Broadcast Graduates Entering Commercial Radio Marketing, Phil Ford Wier
Electronic Theses and Dissertations
No abstract provided.
A New Procedure For Calculating Dipolar Sources Of Eeg Discharges., Joseph Harvey Rothweiler 1952-
A New Procedure For Calculating Dipolar Sources Of Eeg Discharges., Joseph Harvey Rothweiler 1952-
Electronic Theses and Dissertations
A new procedure has been developed for determining the location of the source of certain EEG discharges given the measured surface potentials. The source is modeled as a single current dipole with arbitrary position and orientation, while the head is modeled either as a single homogeneous sphere or as three concentric spheres. This procedure is developed by extending the matched filter concept of communications theory to functions defined on a spherical surface. In addition, simplifications are developed which reduce the amount of computation required. Simulations have been performed using computer generated data to show the validity of the locating procedure …
Employment Status Of Female Administrators And Attitudes Toward Employment Of Female Administrators In The Community College System Of North Carolina, Linda C. Gardner
Employment Status Of Female Administrators And Attitudes Toward Employment Of Female Administrators In The Community College System Of North Carolina, Linda C. Gardner
Electronic Theses and Dissertations
Purpose. The purpose of the study was to determine the current employment status of female administrators and, further, to study attitudes held by female educators, male educators, presidents, and board chairmen of the North Carolina Community College System toward employment of female administrators in the Community College System of North Carolina. (Abstract shortened.)
Population, Home Range, And Dispersal Of Red Foxes In East-Central South Dakota, James D. Sweeting
Population, Home Range, And Dispersal Of Red Foxes In East-Central South Dakota, James D. Sweeting
Electronic Theses and Dissertations
The population, dispersal movements and summer home range of red foxes (Vulpes vulpes) were studied in east-central South Dakota during 1974 and 1975. The spring population density of foxes on a 23,319 ha study area declined from 9.2 families/township in 1974 to 7.6 families/township in 1975. Fifty-four percent of 130 foxes tagged in spring, 1974 and 1975 were recovered during the first year following tagging. Hunting and trapping accounted for 18.0 and 77.8 percent, respectively. Recoveries revealed that dispersing juvenile male foxes were more mobile than juvenile females; juvenile foxes traveled a mean distance of 39 km for males and …
Influence Of Season On Immunoglobulin Absorption And Status In Young Calves, Lynn Maureen Boyd
Influence Of Season On Immunoglobulin Absorption And Status In Young Calves, Lynn Maureen Boyd
Electronic Theses and Dissertations
A high rate of calf mortality can represent a major economic loss to the dairy farmer. Despite increased knowledge in calf rearing, mortality rates of 10 to as high as 25% are not uncommon. The loss of heifer calves alone cost dairymen an estimated $81 million in 1975. This figure does not include the additional costs of extra labor, medication and veterinary expenses, and the loss of genetic potential. The most critical period for calf survival is the first 2 to 3 wk of life. During this time, the calf depends upon colostral immunoglobulins absorbed during the first 24 h …
Model Study Of Swine Manure Pit Ventilation Systems, Gary W. Buller
Model Study Of Swine Manure Pit Ventilation Systems, Gary W. Buller
Electronic Theses and Dissertations
A potential method to attain an optimally controlled swine environment conductive to both the animal and laborer is a pit ventilation system. A pit ventilation system should exhaust noxious gasses and odors that evolve in the pits before natural or forced convection currents transfer the gasses and odors into the livestock environment. This is especially important when minimum airflow rates are employed during winter operation. Pit ventilation systems in swine confinement housing have not continually produced an optimum environment for both the animal and operator. Consequently, improvements in design and performance data on various systems are needed, if more reliable …
Evaluation Of Selected Sludge Disposal Methods, William W. Brinker
Evaluation Of Selected Sludge Disposal Methods, William W. Brinker
Electronic Theses and Dissertations
This research was undertaken to determine the feasibility of dewatering digested sludge using vacuum filters or centrifuges followed by land spreading as opposed to the present method of sludge hauling and disposal. The objectives of these experiments were to: 1 Determine whether the sludge from the Sioux Falls Wastewater Treatment Plant with the addition of a selected polymer could be dewatered by means of a vacuum filter. 2. Determine whether the sludge from the Sioux Falls Wastewater Treatment Plant with the addition of a selected polymer could be dewatered by means of a solid bowl centrifuge. 3. Establish capita costs …
Epiphytic Movement And Survival Of Pseudomonas Syringae On Spring Wheat, Sandra J. Fryda
Epiphytic Movement And Survival Of Pseudomonas Syringae On Spring Wheat, Sandra J. Fryda
Electronic Theses and Dissertations
Field, greenhouse, and growth chamber experiments demonstrated that Pseudomonas syringae, the incitant of bacterial leaf necrosis of wheat, moved from inoculated wheat seed to the seedling and survived as an epiphyte on the leaves. In greenhouse experiments 80-90% relative humidity favored movement of P. Syringae to the coleptile and first true leaf of the seedlings. Movement was not different on wheat cultivars susceptible or resistant to bacterial leaf necrosis. Under 70-98% relative humidity in a growth chamber, P. syringae moved to a significantly higher (P=0.01) percentage of seedlings at 10C than at 16 or 22C. In a field experiment, using …
Estimating The Elasticity Of Demand For Rail Transportation Of South Dakota Wheat, Karen Ann Olson
Estimating The Elasticity Of Demand For Rail Transportation Of South Dakota Wheat, Karen Ann Olson
Electronic Theses and Dissertations
The overall objective of this study is to estimate the price elasticities of demand for rail transportation of wheat produced in South Dakota in 1974. The specific objective of this study is to estimate the demand for rail transportation in shipping wheat and the corresponding elasticity coefficients. By accomplishing this, the impact of changes in rail rates on quantities shipped by rail can be estimated. The degree of substitutability between rail and truck is also measured by estimating the elasticity of substitution. To accomplish the above, data on 1974 grain shipments is used to estimate demand functions from which the …
A Microprocessor Controlled Clock System, Joseph P. Clarke
A Microprocessor Controlled Clock System, Joseph P. Clarke
Electronic Theses and Dissertations
While the areas of time keeping and computers have been somewhat independent, there have been exceptions. The commercial time recording clocks have for many years been used of ring bells in schools and factories. An example of this type of system is the simplex control clock designed by International Business Machines in 1949. This type of clock relies on electromechanical logic. With the introduction of low cost digital logic and microprocessors, the designer has been given the opportunity to develop real time control systems and sophisticated digital clocks. The first attempt at this project definition was to develop a digital …
The Visionary Experience In Three Novels By Joyce Carol Oates, Mary Elizabeth Tonos Brantley
The Visionary Experience In Three Novels By Joyce Carol Oates, Mary Elizabeth Tonos Brantley
Electronic Theses and Dissertations
No abstract provided.
A Content Analysis Of The Huron Daily Plainsman's Coverage Of The Oahe Issue For The Year Of 1975, Ron James Volesky
A Content Analysis Of The Huron Daily Plainsman's Coverage Of The Oahe Issue For The Year Of 1975, Ron James Volesky
Electronic Theses and Dissertations
The study by Spector was based on a comparison of the count of favorable, unfavorable and neutral editorial items with vote on a municipal referendum. Spector found a high correlation between editorial position and the election outcome. The editorial policy of the Bridgeport daily newspaper was decidedly against the municipal referendum. Spector coded 23 unfavorable editorials (against the referendum), one neutral in content, and none favorable. Bridgeport voters voted 73 percent against the referendum. Voters in the 15 1/2 – county Oahe Conservancy Sub-District in 1960 voted overwhelmingly (85.5%) to establish the sub-district board to monitor and promote the Oahe …
Wildlife Habitat Evaluation Of The Unchannelized Missouri River In South Dakota, James R. Clapp
Wildlife Habitat Evaluation Of The Unchannelized Missouri River In South Dakota, James R. Clapp
Electronic Theses and Dissertations
Areas of eight habitats were identified, delineated, and measured along the unchannelized Missouri River in South Dakota. Agricultural and urban developments existed on 60 percent of the land within 1 km of the river. Six habitat types made up the non-developed land in the study area: cottonwood-dogwood (16 percent), cottonwood-willow (9 percent), elm-oak (7 percent), cattail marsh (3 percent), sand dune (3 percent), and sand bar (1 percent). All non-developed habitats except sand bar were sampled to obtain vegetative composition and to determine their value to wildlife. The value of each habitat to nine faunal groups of wildlife was subjectively …
Supplemental Space Heating Using A Solar Energy-Intensifier-Thermal Energy Storage System, James L. Julson
Supplemental Space Heating Using A Solar Energy-Intensifier-Thermal Energy Storage System, James L. Julson
Electronic Theses and Dissertations
Many variations of solar concentrators, solar collectors, and solar thermal energy storage units are currently being investigated for use in agricultural space heating applications. However, limited data are available on the use of solar concentrators and thermal storage systems for specific agricultural applications in most climatic areas. Since useful alternate energy sources are of such great importance, research was conducted with the following objectives: 1. Evaluate the thermal efficiency and energy collecting capabilities of a solar energy-intensifier under actual climatic conditions. 2. Study the temperature and energy storage characteristics of a native stone thermal energy storage unit used with a …
Design And Testing Of A Solar Energy-Intensifier For Drying Shelled Corn, Steven E. Saienga
Design And Testing Of A Solar Energy-Intensifier For Drying Shelled Corn, Steven E. Saienga
Electronic Theses and Dissertations
Agricultural crop drying provides numerous applications where low to moderate temperature rises can provide a large percentage of the grain drying requirements. The application of solar energy to grain drying depends on the capability of the solar energy system to provide temperature rises and enough heat to increase the rate at which moisture is removed from the wet grain. Current investigations of solar energy utilization for agricultural applications include many variations of solar collectors and solar concentrators. However, data available on the use of solar concentrators for specific agricultural applications in most climatic areas are limited. Because of the great …
Winter Operating Constraints Of A High-Rate Infiltration-Percolation Treatment System For Wastewater, Eugene A. Miller
Winter Operating Constraints Of A High-Rate Infiltration-Percolation Treatment System For Wastewater, Eugene A. Miller
Electronic Theses and Dissertations
In order to comply with the federal Water Pollution Control act Amendments of 1972, many small communities in South Dakota are faced with the probability of having to update the quality of wastewater that is being discharged. Many of these communities presently use low-cost lagoons or stabilization ponds that provide various degrees of wastewater treatment. With lack of trained personnel for routine operation and maintenance and the inherent financial problems due to a limited tax base, small communities have a definite need for a simple and inexpensive form of wastewater treatment that ill upgrade effluents from stabilization ponds to meet …
Solar Energy For Supplemental Heating Of Livestock Buildings, David P. Yexley
Solar Energy For Supplemental Heating Of Livestock Buildings, David P. Yexley
Electronic Theses and Dissertations
The cost of energy spans a wide range at various geographic locations, Solar energy has not generally been competitive with other energy sources because of high initial capital costs per unit of energy return for most collector systems. These costs must be justified so that the benefits of the virtually free primary fuel source can become economically attractive. Therefore the objectives of this study were established as follows: 1. Design and compare the efficiencies and total energy supplied by three types of low cost, low temperature rise bare plate solar collectors. 2. Evaluate the performance of solar collectors that can …
Probabilities Of Solar Weather, Hand-Hung Chen
Probabilities Of Solar Weather, Hand-Hung Chen
Electronic Theses and Dissertations
During the last several years we have witnessed increasing costs and shortages of energy from conventional sources. This “energy crisis” promises to be with us for some time to come unless we change our way of life and in addition develop new sources of energy. The energy crisis is spurring the development of several new energy have been considered including heating and cooling of homes, domestic hot water heating, drying of agricultural products and many more. The economic feasibility of a solar system depends upon how well the system perform in the particular location in which it is to be …
The Fate Of Nitrogen In Wastewater Applied To Rapid Infiltration-Percolation Basins, John Peter Dickinson
The Fate Of Nitrogen In Wastewater Applied To Rapid Infiltration-Percolation Basins, John Peter Dickinson
Electronic Theses and Dissertations
The objectives of the work presented herein were to determine: 1. Changes in nitrogen species within the wastewater resulting from rapid infiltration-percolation and 2. Effects of both basin vegetative cover versus scarified surface and differential hydraulic loading rates on the nitrogen species within the effluent discharged from the pilot units.
Inheritance Of Regrowth And Other Characters In Smooth Bromegrass, Geprge Lance Holborn
Inheritance Of Regrowth And Other Characters In Smooth Bromegrass, Geprge Lance Holborn
Electronic Theses and Dissertations
Land utilization is becoming increasingly important; farmers and ranchers are continually striving to produce more from production sites and to realize some production from their presently non-productive areas. Progress in this direction must be forthcoming in all areas of agriculture. In the case of cool-season grass species, growth takes place in the spring and fall of the year. With the exceptions of the cool-season grass species, orchardgrass, Dactylis glomerata L., little if any mid-summer growth is produced. Orchardgrass, however, is not winter-hardy or very productive under dryland conditions in South Dakota. Currently, there are no cool-season grass varieties recommended to …
Use Of Municipal Water Quality Data To Estimate Suitability Of Lagoon Effluents For Irrigation, Dale Allen Johnson
Use Of Municipal Water Quality Data To Estimate Suitability Of Lagoon Effluents For Irrigation, Dale Allen Johnson
Electronic Theses and Dissertations
There are approximately 184 lagoon systems in South Dakota used to treatment of municipal waste water (4). The water quality of these lagoon systems was not available due to lack of samplings. An investigation was initiated by David Odens to determine the suitability of some of these lagoon systems for irrigation. The objectives of Odens’ investigation were as follows: “1. To evaluate the suitability of lagoon effluents for irrigation on the basis of probable water quality, 2. To classify these waters with respect to their suitability for irrigation, and 3. To estimate the quantity of lagoon effluent available for irrigation …
Infiltration-Percolation Capacities And Groundwater Table Influence Of A High-Rate Land Wastewater Disposal System, Alan L. Larson
Infiltration-Percolation Capacities And Groundwater Table Influence Of A High-Rate Land Wastewater Disposal System, Alan L. Larson
Electronic Theses and Dissertations
Specific objectives of this portion of the overall study were: 1) Evaluate the infiltration capabilities of the basins with respect to cover type and loading rates. 2) Describe and evaluate several improvements and additions made to infiltration-percolation basins in 1976. 3) Demonstrate the response of the groundwater to the application of large quantities of wastewater to the land.
The Renewing Of Culture, Ching-Yee Chang
The Renewing Of Culture, Ching-Yee Chang
Electronic Theses and Dissertations
No abstract provided.
Layer Coefficient Determination Of Emulsion Treated Bases, Weizheng Zhu
Layer Coefficient Determination Of Emulsion Treated Bases, Weizheng Zhu
Electronic Theses and Dissertations
No abstract provided.
Control Of Radio Stations In Chile, 1970-1973, Fernando Rene Crisosto-Garces
Control Of Radio Stations In Chile, 1970-1973, Fernando Rene Crisosto-Garces
Electronic Theses and Dissertations
No abstract provided.