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An Investigation Of Receptive And Expressive Pluralization And Tense Inflectional Skills Of Three Year Old Children, James Michael Coffman

Masters Theses

No abstract provided by author.

An Analysis Of The Death-Rebirth Archetype In John Donne's "Songs And Sonets", Eva Diane Fletcher

Masters Theses

No abstract provided.

A Parametric Investigation Of The Validity Of 1/25 Scale Automobile Aerodynamic Testing., Marvin Eugene Doberenz

Masters Theses

"Wind tunnel tests have been performed measuring the aerodynamic forces and underbody boundary layer profiles for 1/25 scale models. The trends of the force coefficients with Reynolds number, the underbody boundary layer profiles, and the influence of the ground plane boundary layer on the force coefficients of small-scale models has been shown to be similar with previous results from larger models. This study has shown the usefulness of small-scale models for parametric studies of automobile aerodynamics. The agreement of the data with previous results, also supports the possih1lity o f a method of correction for boundary layer growth on fixed …

A Master Data Bank In Power Systems., Nittaya Hokierti

Masters Theses

"A Master Data Bank (MDB) is used to prepare the data sets of large power system networks for later study. The MDB program has been developed to be compatible with data and formats used in load flow and short circuit studies. The MDB can store up to six sets of base case data. Magnetic disk storage is used as the storage medium to obtain adequate data storage and faster access to the data. The size of storage can be expanded by modification of statements in the MDB source program and job control statements. The data sets in the MDB can …

A Unit Hydrograph For The Missouri Ozark Region., Melvin G. Schaefer

Masters Theses

"Eleven small watersheds from the Missouri Ozark region are used in generating a synthetic unit hydrograph. The analysis is composed of three parts: First, a prediction equation is developed which correlates the time lag parameter with the physical features of the watershed. Second, an equation is developed which predicts the peak flow ordinate for 30-, 60- and 120-minute unit hydrographs. Third, an average dimensionless unit hydrograph is determined"-- Abstract, p. iii

Project Program Evaluation Technique For Real Property Maintenance Activities., Richard Walter Graumann

Masters Theses

"Managers of Real Property Maintenance Activities often only consider workmanship and customer satisfaction when evaluating the overall effectiveness of their contracted maintenance and construction projects. For multi-functional organizations where top management is responsible for the execution of several hundred concurrent, unrelated, unique, and widely dispersed projects, these subjective factors are not adequate to conduct a meaningful evaluation.

Top management must continually assess not only the progress of contracted work, but also the engineering design and contract administration functions. Published material has given little attention to the need for aggregating project data in a multi-project environment to provide management with the …

Creep And Stiffness Of Full Column Resin Grouted Roof Bolts., Wesley Clare Patrick

Masters Theses

"A three-phase test program was utilized to evaluate some creep and stiffness parameters of several types of full-column resin-grouted roof-bolt installations. The tests indicate that: (1) a large percentage of an applied load bleeds off during the first 100 hours subsequent to bolt installation; (2) the amount of load bleed-off is a f unction of the grout annulus size and the bolt surface roughness; (3) retightening of grouted rock bolts reduces the magnitude and rate of the load bleed-off phenomenon; and (4) resin-grouted roof bolts provide a stiffer roof support system in that bolt elongation resulting from an applied load, …

Denitrification Of A Synthetic Waste With A Submerged Filter, Dominic Joseph Grana

Masters Theses

"The facultative anaerobic submerged filter is a plug flow, packed bed, column type reactor in which the facultative microorganisms responsible for nitrate reduction are attached to the filter media. The objective of this study was to evaluate filter performance and the kinetic equations of the process under variable conditions of flow rate, nitrate nitrogen concentration, and organic loading.

Two 0.5 cu ft (14.25 1) laboratory filters were operated for 144 days at 35°C using a synthetic waste as the substrate. Filter media consisted of smooth quartzite stone, 1 to 1.5 in. (2.54-3.82 cm) in diameter. Each filter had a porosity …

Ionic Thermal Current In Sodium-Rubidium Silicate Glasses., Chi-Ming Hong

Masters Theses

"The ionic thermal current (ITC) method has been employed to study alkali ion motion in a sodium silicate glass and two sodium-rubidium silicate glasses over the temperature range 110 ° K to 400 ° K. T wo peaks and three peaks were observed in a l.0Na₂O-3.0SiO₂ glass and a 0.75Na₂O-0.25Rb₂O-3.0SiO₂ glass, respectively. Only one peak and a high temperature shoulder were observed in the 0.50Na₂O-0.50Rb₂O-3.0SiO₂ glass. These peaks were attributed to orientation and space charge polarization with each peak associated with a particular movement of the sodium …

Investigation Of A Modulation Method And Signal Processing Techniques For Digital Data Transmission In Hf Channels., Michael Ray Campbell

Masters Theses

"This thesis presents a method of improving the performance of digital communication systems operating in environments typical of the high-frequency (HF) band. The HF channel is a compound error event channel in that it contains random errors due to additive white Gaussian noise (AWGN) plus burst-type errors due to effects such as impulse noise and tone interference. A method of signal design using the time-frequency plane is utilized. This facilitates design of signal sets that may be blanked in time and frequency, thus reducing the effects of the nonGaussian interference. Several signal designs are presented and compared in t􀁗rms of …

Experimental Investigation Of Supporting Wire Interference Effects In The Supersonic Near Wakes Of Slender Bodies., Dale M. Pitt

Masters Theses

"It is generally recognized that the presence of a model support sting i s likely to affect the model's base pressure and wake characteristics. The use of a wire-supported model is usually relied upon to obtain minimum disturbance measurements in the model's wake. Investigations into the disturbances caused by different size supporting wires have been conducted with the use of a 16-degree wedge and cone. The tests were conducted in the University of Missouri-Rolla axisymmetric supersonic wind tunnel at Mach 3.15, and at a Reynolds number of 2.14 X 10⁶ per inch. Pitot pressure traverses were made in the …

A Study Of Trace Organic Emissions In Mining And Milling Wastewaters In The New Lead Belt Of Southeastern Missouri., Alan James Callier

Masters Theses

"The primary objective of this study was to evaluate the trace organic contributions by two lead and zinc mining and milling operations in Southeastern Missouri. A secondary objective was to evaluate a reverse osmosis-solvent extraction method for use in recovering trace organics.

Trace organics were recovered in the first phase of the study following procedures as outlined by the American Society of Testing and Materials (ASTM), with chloroform and benzene being used as the solvents. The data indicated that the milling waste contained a larger concentration of trace organics than the excess mine water. Furthermore, it was shown that recycling …

A Study Of Product Inhibition In The Reaction Of P-Nitrophenyl- Α - D - Glucoside Catalyzed By The Enzyme Glucoamylase I., Mark L. Dickhaus

Masters Theses

"The entire time course of the hydrolysis of p-nitrophenyl-a-D-glucoside by the enzyme glucoamylase I was followed spectrophotometrically. Using time versus absorbance data the constants in the Michaelis-Menten equation were determined. The effect of the addition of product to the initial reaction mixture and the effect of solvent and temperature were determined. It was found that product produced during the reaction did not have the same effect upon the rate as did product added initially to the reaction mixture. The presence of substrate caused the enzyme to acquire protection against inhibition by the product"-- Abstract, p. ii

Computational Models Of Learning., Kenneth Jesse Marse

Masters Theses

"An investigation is made into the use of techniques which would normally be described as learning if encountered in a human being. A literature review of several subject areas including game-playing computer programs, automatic control systems, pattern recognition methods, and biological modeling is performed, with the purpose of extracting and examining those processes which exhibit learning. A general model of the type of learning most widely utilized in these areas is constructed and used to compare and contrast specific models which describe the learning techniques employed. Some specific models which do not exhibit learning as described by the general model …

Where Past Meets Present: A History Of The Arthur Amish, Jane Ann Ping

Masters Theses

No abstract provided.

The Socialists Within The Black American Experience, 1917-1924, John M. Andrick

Masters Theses

No abstract provided.

A Method Of Predicting The Economic Effects Of Highways In Undeveloped Countries., Mohamed Magzoub Abdallah

Masters Theses

"This paper reviews the findings of the socio-economic impact studies pertaining to land-use changes. An attempt is made to explain, through land-use studies, the relationship between the past and future development of the City of Rolla, Missouri, and the system of highways serving the city, The relationship between land-use changes, expressed in active units rather than areas, and the level of activity related to those changes, rep resented by 0-D traffic volumes, is studied for Rolla and the difference in the behavior of this relationship in undeveloped countries is discussed"-- Abstract, p. ii

A Geochemical And Microscopic Study Of A Recently Discovered Deposit In Southern Illinois Fluorspar District., Prachon Chareonsri

Masters Theses

"A bedding-replacement fluorite deposit, discovered by recent drilling in the northeast part of the Cave in Rock district, southern Illinois, has been studied by a combination of geochemical, X-ray, and microscopic techniques. The dispersion pattern for trace zinc, lead, cadmium and copper concentrations in carbonate host rocks adjacent to the fluorspar deposit, determined by atomic absorption spectrophotometry, appears to hold only little hope in serving as an aid to exploration. Only cadmium anomalies appear closely related to the known fluorspar ore, and those values are not greatly above background.

Broad zinc and cadmium anomalies and a narrow lead anomaly are …

A Design Of A High-Voltage Ionization Test Chamber., Jorge Anibal Chiriboga

Masters Theses

"The purpose of this thesis was the design and construction of a test ionization chamber which can be used in the teaching and research of several phenomena involving electrical breakdown of gaseous insulation materials.

Principal electrical discharge laws and effects, as well as their performance, are discussed as bases upon which the chamber was designed. The chamber presents the necessary characteristics for being used as a "multi-purpose" test chamber; in other words, it has the conditions for being used in the study of many electrical discharge phenomena"-- Abstract, p. ii

A Comparison Between Direct Waves And Head Waves In A Seismic Refraction Profile., Nelson Jose Aboud Garcia

Masters Theses

"The purpose of this investigation was to experimentally verify the theoretical prediction that the particle velocity of a head wave is the time integral of the particle velocity of a direct wave.

The procedure was to use small explosions in the field to generate direct waves and head waves in a surface layer of low compressional velocity overlying a higher velocity medium. The direct waves were distinguished by the ratio of frequencies and by the slopes in a time distance plot.

The result of comparing the particle velocity of the head waves with the integral of the particle velocity of …

An Optimization Method For Scheduling Nuclear Reactor's Refueling St. Louis County, Missouri., Abbas Razavi

Masters Theses

"This paper describes a method to optimize the refueling schedule of the nuclear units. The method finds a mid-range (five to ten years) optimum refueling schedule by varying the refueling date of the nuclear units. The cycles of the nuclear units are the variable parameters, with fuel enrichment and quantity being fixed.

An empirical technique is used to calculate the nuclear fuel cost. Seasonal constraints are taken into account, and no nuclear unit will be shut down while another is down"-- Abstract, p. ii

An Examination Of The Adaptive Random Search Technique., Mark William Heuckroth

Masters Theses

"Random search procedures have recently been successfully applied to the optimization o f a variety of chemical engineering problems, including optimization of chemical processes by flow sheet simulation. These procedures represent the independent variables as random variables described by probability distributions. The adaptive random search procedure centers the distribution for each variable about the best search point found and examines this region for a better point. Thus, this technique has the ability of continuously moving the search region toward the optimum, which is particularly advantageous in following constraints.

This study examines the efficiency of the adaptive random search technique as …

Variables Affecting The Rate Of Solution Of Mold Inoculants In Cast Iron, Jose Osorno Fonnegra

Masters Theses

"The purpose of this investigation was to measure the effectiveness of an inoculant alloy reacting with molten cast iron in a reaction chamber properly located in the gating system.

The chemical composition of the gray iron was held constant while several metallurgical factors were varied to produce test samples with different cementite thicknesses. These chill depths were measured as an indication of the inoculation effectiveness.

Appreciable differences in chilling tendency were observed within the different variables studied. The results indicate that pouring temperature, as well as the other variables studied, are of considerable importance when dealing with inoculation of gray …

An Organizational Structure For A Highway Agency., Frank L. Carroll

Masters Theses

"Highway agencies in the past have been organized to give primary consideration to economic factors. Th e National Environmental Policy Act of 1969 changed this concept by requiring all states to reevaluate their highway organizations in order to ensure that social and environmental factors, as well as economic factors, are considered.

Various state highway organizations are analyzed to determine the way in which consideration is given to the social, economic and environmental effects of design, and a model organizational structure for a highway agency is developed.

Because considerable difference exists in the ways in which the states have approached the …

Analysis Of The Stresses Induced In Rock By Rock Splitters., Diogenes De Jesus Chollett

Masters Theses

"The method of solution of the problem of determining the stress and displacement distributions around an unfractured circular hole subjected to nonuniform applied internal pressure located in an infinite plate is developed. Two problems are solved for two different representative boundary conditions. The problem of determining the stress distribution around a circular hole with two symmetric radial cracks subjected to nonuniform applied radial pressure located in an infinite plate is analyzed and developed for further solution"-- Abstract, p. ii

An Investigation Into The Extent Of Implementation Of Operations Research Techniques For Inventory Control In Industry., Edward Allen Scarff

Masters Theses

"The object of this research is to investigate the techniques currently utilized for controlling inventories in industry. The various significant methods of inventory control in use today are presented and the strengths and weaknesses of these methods are assessed.

A survey of the Fortune 500 companies was conducted to determine the methods of inventory control in use today by industry. In addition, selected production personnel of representative companies were interviewed to determine the advantages and disadvantages of certain inventory control methods they use.

The results of the survey and the interviews are presented, and an analysis is made. Conclusions are …

An Experimental Model For Predicting The Commodity Futures Market., C. E. Roy Francis

Masters Theses

"Trading of· commodity futures contracts is one of the purest forms of speculation available today. Inherent is the risk of substantial losses. In an effort to reduce these risks, this research was undertaken.

As a result, a computer program was developed to forecast the prices of commodity future contracts on a daily basis. The program employs the Monte Carlo Technique of simulation and provides expected values for the next trading day.

During the development and testing of the prediction model. various trading techniques were also tested. A trading technique utilizing the difference between the forecasted price and the actual price …

Effect Of Temperature, Aging, And Composition On Phase Development In The System Al₂O₃-P₂O₅-H₂0., John Allan Middleton

Masters Theses

The chemical and physical conditions for the formation of various phases of aluminum phosphate were studied. Mixtures of Al₂O₃ and H₃PO₄ were aged in sealed containers and examined for phase development by X-ray diffraction. The results revealed the aging of samples to be a critical process for the formation of equilibrium phase assemblages at low temperatures, Initial composition becomes important as equilibrium is neared and at elevated temperatures when the molar ratios of Al₂O₃, P₂O₅, and H₂O determine what phases will be formed. Temperature …

Vapor Pressures For The Ternary System 1-Butene, Isobutane, And 1, 3-Butadiene., Kevin Steele

Masters Theses

"An innovative apparatus suitable for the rapid but accurate measurement of vapor pressures of liquid solutions is described. Liquid solutions of known composition are prepared in a test cell by volumetric metering of degassed liquids. The operation of the apparatus is feasible over a wide range of temperature and pressure, producing data with an estimated probable error of ± 0.05 percent. Experimental P-X data for a system of C₄ hydrocarbons (1-Butene, Isobutane, and 1,3- Butadiene) are reported from 40-160 degrees Fahrenheit. The data are in agreement with the literature, and vapor pressures are expressed as a function of temperature …

A Study Of Several Substitution Ciphers Using Mathematical Models., Wanda Louise Garner

Masters Theses

"This paper will consider vector and matrix representations for several polyalphabetical substitution ciphers. Classical ciphers such as the Vigenère, the True Beaufort, the Variant Beaufort, and the autokey will be included. We shall also discuss ways to mathematically vary a substitution cipher. In addition, we shall employ our mathematical representations to decipher a fixed matrix substitution cipher"--Abstract, p. ii