Digital Commons Network^™

The Control Of Noise In Urban Areas., Edwin Eugene Frye Jr.

Masters Theses

"Noise has recently been labeled the 'fourth pollutant' and defined by some as the 'unwanted sound' that pervades our work environments and the privacy of our homes. This concern for noise and its effects has resulted from our nation's increasing population density, the increasing use of mechanized conveniences, the influx and growing use of mass transportation systems, and the public's awareness that noise not only 'annoys' and can increase everyday tensions and anxieties, but at certain levels can cause permanent hearing loss.

In order to curb the 'noise problem' legislators and municipal representatives began applying legal controls to noisy activities …

A Study Of Pollution Abatement From The F-15 Jet Engine Test Stand, Gary Joseph Fennewald

Masters Theses

"The pollutants emitted from jet engine test stands are carbon particles, unburned hydrocarbons, carbon monoxide, and the oxides of nitrogen. This work is a study of various ways of removing these pollutants from the test stand exhaust. The methods investigated include absorption, adsorption, electrostatic precipitation, filtration, catalytic reduction and oxidation, and thermal oxidation.

For abatement of nitrogen oxides, none of the present methods is considered to provide adequate technical reliability to proceed with an installation at this time. Each of the methods for removal of nitrogen oxides has high capital and operating cost; and, in many cases, secondary pollution problems …

Minorities Are Not Prepared For Accepting Jobs In The Petroleum And Petrochemical Industries., Freddie Lorace Thompson

Masters Theses

"A survey has been made from nine petroleum and petrochemical companies in the Houston area to get recommendations on the training required for minorities to secure jobs and advance in these industries. Information gathered through this survey consist of the following; (1) recommendations on careers minorities should concentrate their training to secure jobs in these industries; (2) the demand for qualified technical minority graduates far exceeds the supply; (3) a vehicle whereby minorities can be trained and inducted into the petroleum and petrochemical industries; and (4) the companies surveyed are putting forth an honest effort to increase their job mix …

Kiss Gating In Sand-Cast Aluminum Alloys., Michael Lynn Holt

Masters Theses

"This thesis describes the optimum conditions necessary for the production of macrosound plate castings of sand-cast aluminum alloys by the kiss gating process. Castings of alloys of different freezing ranges in the Al-Si-Cu system (alloys 195, 319, 380, and 384) were produced and examined visually to evaluate the effectiveness of various gating systems and superheats on the production of macrosound castings.

For the aluminum alloys used in this investigation, the optimum conditions leading to the production of macrosound castings without the use of risers are one or a combination of the following: (l) wider freezing ranges; (2) pressurized gating systems; …

High Density Serial Encoded Tape Systems., Billy J. Romine

Masters Theses

"A digital approach to phase lock loop design is presented. Two separate circuits are developed and analyzed. The circuits developed have certain characteristics which can be applied to serial data encoded tape systems. One of the circuits can be expanded into a multiple track configuration with a minimum amount of hardware. The second circuit features a fast initial synchronization method over a wide input frequency range.

The application 0£ the phase lock loops to the retrieval 0£ serial encoded data is investigated. Three representative data encoding methods are considered. The approximate bit density obtainable with each encoding method is calculated …

Application Of An Inverse Heat Conduction Technique To A Simulated Injection Mold., Noel Joy Rytter

Masters Theses

"An analytical model was constructed to investigate the heat transfer in an injection mold for which the temperature was controlled by a special mold heating-cooling process. Several techniques were used to test the validity and accuracy of the analytical model of the mold and to explain some singularities that occurred. It was determined that the thickness of the plastic part being molded is the primary factor affecting the minimum cycle time for the molding operation. Also, abrupt changes in temperature on the molding surfaces are very difficult to obtain because this requires drastic temperature changes for the working fluid that …

A Study Of Digital Computer Control Of A Continuous Pulp Digester., Charles Edward Barker

Masters Theses

"Detailed analysis of six basic control loops for a Kamyr continuous digester is described using z- and s- transform methods. An example of a digital computer control system for a continuous digester is also presented"-- Abstract, p. ii

Graph Model Analysis Of Computer Structures, Ömür Taşar

Masters Theses

"Graph theory is applicable to the solving of problems in nearly every field of scientific study. The purpose of this thesis is to consider its applications in representing and analyzing digital computers. Fundamental graph theory definitions, the types and the properties of the directed graphs, the matrix representation, and several reduction techniques are discussed. The blocking gate method for diagnosing computer systems is described and applied to the Scientific Control Corporation (SCC) 650 for its fault-diagnosis.

Microprogramming has been a significant trend in hardware and software designs of computers. Microprogrammed computers are discussed in comparison to conventional computers. A general …

Waste Heat Utilization From A Direct Cycle High Temperature Gas Cooled Nuclear Reactor For District Heating And Air Conditioning, John Joseph Blase

Masters Theses

"An analysis was conducted to determine the economic as well as technical feasibility of waste heat utilization from the proposed direct cycle high temperature gas cooled nuclear reactor, as designed by the General Atomic Company.

The rejected heat from this system is at considerably higher temperatures than those normally encountered in conventional steam-electric Rankine cycles. By taking advantage of these higher rejection temperatures, heat was translated into energy available to a district heating and air conditioning service. The transportation of this energy was considered to be in the form of heated and chilled water.

A refrigeration capacity on the order …

Detection Of Impurities In Zinc Sulfate Electrolytes By Cyclic Voltammetry Techniques., Bruce Alan Lamping

Masters Theses

"A cyclic voltammetric technique has been developed for quantitatively detecting the presence of active chemical species present in zinc sulfate electrolytes. The experimental apparatus consisted of a pyrex "H" cell, an Al cathode encased in a Teflon holder, a carbon anode and a mercurous sulfate reference electrode. Voltammograms were obtained from industrial, purified neutral leach solution (Cominco Ltd., Trail, B.C.) acidified to give a final concentration of 0.77 M Zn⁺⁺, 1 M H₂SO₄. The polarization curves were then evaluated and used as a reference standard to compare with results obtained when various organic and …

Characterization And Pollutional Contribution Of Stormwater Runoff From A Small Urban Area., John Lamb Wendleton

Masters Theses

"Stormwater runoff from urban areas has long been recognized as a pollutional source, however, only in the last decade has there been an extensive eff ort to measure its effect on receiving lakes and streams. Because runoff from small urban communities has received limited attention, this investigation was undertaken to determine the quality and pollutional contribution of stormwater runoff from a small urban area. The specific objectives of the study were: to characterize and correlate runoff quality with land use activity and to qualitatively and quantitatively measure the pollutants discharged with respect to time.

Runoff from 3 test watersheds in …

Feed-Forward Control Circuit For A Computer Controlled Dc Motor - Ac Generator Set., Richard Allan Smith

Masters Theses

"The current trend of development of generation in electric utility systems is toward complete on-line computer control of real and reactive power generation. In keeping with this trend this work is to design, construct and operate a laboratory model of a computer-controlled power system generator. The equipment design is guided by a desire to allow real time computer control and program assignment of generation levels.

This work is intended as a first step in the development of a complete on-line computer-controlled laboratory model of a power system. It will make possible the study of state-of-the-art methods of operation of power …

The Completions Of Local Rings And Their Modules., Christopher Scott Taber

Masters Theses

"This paper gives a generally self-contained introduction to the completions of local rings and their modules. The '.Fbrmal Power Series, the Ideal-adic, and the Projective Limit completions are established, and the conditions under which they are equivalent are also given. In addition, two methods of obtaining the completion of an R-module from the completion of the ring Rare supplied. As an ideal of R may also be taken as an R-module, a discussion of obtaining its completion from the completed ring is also provided. Two well-known examples are furnished in this paper"--- Abstract, p. ii

Feasibility Study Of An Electromagnetic Trap Fusion Reactor., Dennis Gilbert Blondin

Masters Theses

"Through the use of detailed particle and energy balances, electromagnetic traps with magnetic cusps are found to be unsatisfactory for continuous operation when using only neutral particle beams to sustain a thermonuclear plasma. Low power multiplication characteristics inherent in this CTR design probably preclude supplemental plasma heating methods. However, by using an alternate Yin-Yang magnetic system, continuous CTR operating regimes are found at an ion temperature of 20 keV while assuming only neutral particle beam heating. Although these regimes require applied electrostatic potentials approaching a half-million volts, this device demonstrates a capability for efficient power production"-- Abstract, p. ii

Models For Molecular Vibration, Allan Bruce Capps

Masters Theses

“The purpose of the investigation is to determine if a classical model can be used to characterize molecular vibrational and librational (restricted rotation) frequencies. In general, the model treats a molecule as asymmetrical and rigid and simulates the intermolecular forces by springs along the bonds. Molecules constrained to a plane and molecules free to move in three dimensions are analyzed. The frequencies of water molecules are investigated, in particular. The model and analytic components are found to function well. Within the limits set for the model, the water molecule simulation is not successful as the motion becomes anharmonic for energy …

Effect Of Dissolved Water On Physical Properties Of Silver Borate Glasses, E Richard Reynolds

Masters Theses

"The effect of dissolved water on borate glasses containing 4-20 mol % Ag₂O was investigated. Water was dissolved in the glasses by bubbling with a carrier gas (oxygen) containing different partial pressures of water vapor. A minimum in water solubility was found at 11 mol % Ag₂O. Water contents in excess of 0.5 mol % H₂O did not have a great effect on the transition temperature or the dilatometric softening point. Below 15 mol % Ag₂O, the water content had no effect on the thermal expansion coefficients. Beyond 15 mol % Ag …

Computer Analysis Of 3-Phase Induction Motor Operation On An Open-Delta Distribution System, S. Clark Seematter

Masters Theses

"Open-delta/open-delta and open-wye/open-delta transformer banks are often used as an economic means of supplying simultaneous single-phase and 3-phase loads. If the 3-phase load is an induction motor and if these banks are used, the inherent voltage unbalance causes increased losses and uneven heating that may lead to motor failure. Two previously published theories are used to predict motor heating that is caused by the unbalanced voltages and the motor derating that is necessary to prevent insulation failure"--Abstract, page ii.

Flow Field And Heat Transfer For Developing Flow Of Molten Glass In A Duct, Russell Ralph Beckmeyer

Masters Theses

"The molten glass flow (temperature range 1300 to 1500°C) in the entrance region of a duct was investigated with numerical methods. The mathematical model was restricted by assuming: (1) two dimensional, steady state, (2) Newtonian fluid, variable viscosity, and (3) Rosseland approximation. In addition, appropriate use was made of the fact that the Reynolds number is small and the Eckert number is very small. The inclusion of temperature dependent viscosity and a Rosseland approximation for radiation produced from the mass, momentum, and energy equations a system of coupled, nonlinear, partial differential equations which were solved by an iterative finite difference …

Magnetostrictive Aftereffects In A Dilute 50fe-50ni-C Alloy, Raj N. Master

Masters Theses

"Crystallographically equivalent interstitial sites are energetically equivalent when the host crystal is free of any fields. This situation is shown in Fig. Pl from which it may be appreciated that the difference of the free energy of the "crystal" with an interstitial "I" located in "x" and "y" sites, respectively, is equal to zero. This energy equivalence of the various interstitial sites is destroyed when the host crystal is subjected to fields such as strain fields, magnetization fields or a combination of both as may be appreciated from Figs. P2 through P4. In this case, the interstitials will preferentially occupy …

Comparison Of Scatter Storage Techniques Using An Analysis Of Variance Model, Robert Lee Kitsch

Masters Theses

"An analysis of variance model is developed to determine if a significant difference exists between various scatter storage techniques. The model is a two-factor hierarchical mixed design with each combination of transformation and search method considered as a treatment. The data used in the analysis is obtained from a computer program which provides statistics on the number of probes needed to load the (k+l)st item into a table for the different treatments. An ANOVA table was then computed for various load factors.

A significant difference among the treatments was detected for load factors above .4. Comparison of individual treatments using …

A Study On Two Iodine Containing Peptides Isolated From Porcine Thyroglobulin, Frederick E. Bishop Jr.

Masters Theses

"Two iodopeptides were isolated from thyroglobulin that had been digested with trypsin by paper electrophoresis and paper chromatography. The amino acid analysis demonstrated that the amino acid compositions were similar. The N-terminal amino acid of both iodopeptides was shown to be leucine. The amino acid sequence of one of the iodopeptides was determined by the Edman degradation method and digestion with the enzyme Carboxypeptidase A. The sequence was shown to be: NH₂-Leu-Asn-Ala-Ser-Glu-MIT-Gly-Thr-Ser-Gly-COOH. Other workers have shown that synthetic tyrosyl peptides with the sequence Glu-Tyr are iodinated by the thyroid peroxidase enzyme with a greater specificity than other tyrosyl peptides. This …

Laboratory Evaluation Of Dynamic Soil Properties By Ultrasonic Testing Methods, Ronald Maurice Eckelkamp

Masters Theses

"Measurement of ultrasonic compression and shear wave velocities through a soil material has been made with a pulse wave generator developed at the University of Missouri-Rolla. The variation of these velocities along with the behavior of the dynamic material parameters of the material (Young's modulus, shear modulus, Poisson's ratio) with void ratio and degree of saturation were determined. Compression wave velocity, shear wave velocity, Young's modulus and shear modulus were found to decrease with increasing void ratio; degree of saturation was of little influence. Wave attenuation could not be measured by the test procedure used"--Abstract, page ii.

Transformer Connection Study For 138 Kv To 12.47 Kv Substations Of The Union Electric Company St. Louis, Missouri, John Glenn Walsh

Masters Theses

"This thesis examines the transformer connections that can be used in the new 138-12.47 kV substations on the Union Electric power system. The object is to determine if a zero phase shift transformer without a delta connected tertiary winding can be used and economically justified. Traditionally a delta winding has been automatically included for this application without taking engineering time and effort to study all ramifications including possible dollar savings available with other connections. Three transformer manufacturers supplied technical and cost data which are analyzed, based on Union Electric system conditions. Consideration of relaying, harmonics and unbalanced loading shows that …

Diurnal Solar Heating And Cooling Of A Water Reservoir, Stephen Patrick Lepper

Masters Theses

"The transient diurnal heating of a water reservoir by solar radiation; and its cooling by surface convection, evaporation, and radiation emission was analytically modeled. The directional and spectral properties of the incident solar radiation, the air-water interface, and the selective attenuation of radiant energy by the water were properly included in the analysis. The diurnal vertical temperature distribution was predicted by numerically solving the energy equation using a finite difference technique. It was determined that the surface boundary conditions and the selective absorption of radiant energy by the water strongly influence the thermal stratification of stagnant water.

The diurnal compensating …

Interpretation Of Imagery Lineations, Logan Creek Area, Southeast Missouri, Gregory Paul Smith

Masters Theses

"Depletion of ore in Missouri's old lead districts and the opening of the state's new lead district adds impetus to understanding and delineating geologic structure in and adjacent to the new lead district. Image and geomorphic analysis, hydrologic data, and subsurface structural contour mapping are used in interpretation of geologic structure in Dent, Shannon, Reynolds, and Carter counties, Missouri. Unlike the time consuming surface geologic mapping, the modes of investigation used in this study enabled the writer to make a larger, regional-scale study with results comparable to those attainable by surface mapping. The area is covered by thick residual soils …

On Finding A Minimal Multiple Fault Test Set In Combinational Networks., Dang Quang Tam

Masters Theses

"A simple and systematic approach which generates exactly a minimal multiple fault test set T mm in irredundant combinational networks is presented. It is shown that the Equivalent Sum of Product of a given network contains all the information necessary to determine this minimal test set. The failures which may occur are limited to permanent stuck at O (or 1) faults"-- Abstract, p. ii

A Study Of Some Heuristic Models For Predicting The Reflection From Spherical Surfaces., Bruce Wayne Rau

Masters Theses

"Four heuristic models' available for predicting the behavior or radiation Non regularly reflected from spherical surfaces have been studied. The four models include: the classical Lambert, the s-factor as deduced by Look, the Lommel-Seeliger, and the Euler's approach. Because each of these analyses was deduced for flat plate geometry, it was first necessary to integrate these flat plate expressions over the surface of a sphere to develop appropriate expressions for the power rejected from the surface of a sphere based upon e ach of the above theories. As an integral part of this investigation, various basic quantities were listed (i. …

Data Acquisition And Analysis System For Computer Modal Analysis Of Automotive Exhaust Emissions., Edward Leroy Mabie Jr.

Masters Theses

"A data acquisition and reduction method for modal analysis of undiluted automotive exhaust emissions is presented. 'The procedure on which this method is based ·wa.s developed and presented in a. paper by Donald L. Stivender, in 1971, entitled, "Development of a Fuel-Based Emission Measurement Procedure." This method is presented as a. viable a.1ternative to the diluted constant volume sample by bag collection technique specified in the federal test procedure for emissions from light duty vehicles.

The instrumentation used for the acquisition of data was the type normally used for automotive emission studies. The four instruments used for exhaust gas analysis …

An Analysis Of The Bourbeuse River As A Source Of Concrete Aggregate., David John Lexa

Masters Theses

"This thesis represents a study made to evaluate the sand and gravel deposits of the Bourbeuse River as a source of concrete aggregate. The Meramec River has long been a major source of aggregate in Missouri; however, proposed dam construction will limit the quantity available for exploitation. The Bourbeuse River, a tributary of the Meramec, was chosen for evaluation as an alternate source.

The study was conducted in two parts: an estimation of available quantity; a determination of the quality of the material. Quantity of material was estimated through an analysis of drill logs, correlated with the results of basic …

Regional Geological Engineering Mapping By Erts-1 Imagery A Case Study On Taiwan., Shih-Tsu Chen

Masters Theses

"Three types of maps of Taiwan were made by using color composites of ERTS-1 images. The three types of maps, consisting of a regional land use map, an offshore sediment distribution map, and a tectonic map, were made from a color composite imagery utilizing Diazo chrome and Esco chrome films with a planimetrically accuracy sufficient for a 1:1,000,000 scale map.

Color enhanced imagery was found to increase the accuracy level of the land use interpretation. Three color enhancement techniques were used to increase the color contrast between the scenes of different land use. Particular land use scenes required a special …