Digital Commons Network^™

The Chemical Oxidation Of Alkyl Benzene Sulfonates With Potassium Permanganate., Rameshchandra M. Patel

Masters Theses

"The purpose of this investigation was to study the chemical oxidation of alkyl benzene sulfonates with potassium permanganate. ABS concentrations of 3, 5 and 10 mg/1, and potassium permanganate dosages of 0.5, 1.25, 2.5, 5.0, 10.0, 20.0, 40.0 and 80.0 mg/1 were used. The study was made in deionized water at room temperature and a pH value of 8.5. A 5-hour detention period was provided. The ABS concentration, potassium permanganate concentration, foam volume and foam stability were the main parameters employed.

It was found that potassium permanganate significantly reduced the ABS concentration and foam volume. The rate of the oxidation …

A Time Optimum Bang Bang Control System Under Specified Inputs., John F. Curtin

Masters Theses

"The problem presented is a study, by simulation on an analog computer, of a time optimum "bang bang" control system with a second order plant. Phase plane analysis techniques are used to describe the performance of the second order plant under the action of a maximum effort controller. From this, the system logic is developed for time optimum response to a step reference input. A fast time model of the plant is used to obtain repeated high-speed extrapolations of the plant outputs, at the same time a linear predictor generates future values of the reference. The error functions thus found …

A Study Of Methods For Estimating Parameters In Rational Polynomial Models, Thomas B. Baird

Masters Theses

“The use of rational polynomials for approximating surfaces is investigated in this study. In particular, methods for estimating parameters for a rational polynomial model were investigated.

A method is presented for finding initial estimates of the parameters. Two iterative methods are discussed for improving those estimates in an attempt to minimize the sum of the squares of the residuals. These two methods are (1) Scarborough’s Method for applying the theory of least squares to nonlinear models and (2) the Method of Steepest Descent.

Data from two functions were chosen and approximated as illustrations. Each set of data was used two …

A Study Of The Responses Given By Drop-Outs To The Drop-Out Questionnaire, And The Scale Question Form Used In The Project "Operation Second String High School Drop-Outs In Mattoon, Illinois", Alan D. Adamson

Masters Theses

No abstract provided.

The Sepoy Rebellion, Dan M. Hockman

Masters Theses

No abstract provided by author.

The Development Of Scoring For Trumpet In Contemporary Orchestral Literature, Roger Maulding

Masters Theses

No abstract provided by author.

Development Of A Technique For The Determination Of Capillary Pressure Curves Using A Constantly Accelerated Centrifuge, Robert N. Hoffman

Masters Theses

"A new technique for determining capillary pressure curves with a centrifuge has been developed and tested. Capillary pressure curves were determined for six cores by this technique and were compared to the curves for the same cores determined by the semi-permeable barrier technique. The technique differs from previously reported centrifuge techniques in that the centrifuge was slowly accelerated from zero to the maximum desired speed, rather than being held constant at particular, progressively higher speeds. An important advantage of this technique over other methods for determining capillary pressure curves is the short time required to obtain the desired amount of …

An Investigation Of Optimum Journal Bearings., Kulin Purshotam Maskai

Masters Theses

"Not much has been done towards calculating the "Optimum Bearing" from the point of view of maximum load capacity or minimum friction. It has been found that there 1 is not much difference in the "Optimum Bearing" proportions, as calculated, considering either minimum friction or maximum load capacity

Journal bearings are commonly used and they play a very important role in reducing friction and wear. Engineers use past experience in choosing a bearing for the given conditions. A bearing design can be obtained if 'Optium Bearing' proportions are calculated as suggested by Kingsbury (1) in his article on 'Optium Conditions …

Zinc Sulfide-Sulfate Reaction Pressures, William L. Hallerberg

Masters Theses

"A static manometric method was used to find the equilibrium reaction pressure as a function of temperature for the reaction:

11 ZnSO₄ + ZnS → 4 (ZnO·2ZnSO₄) + 4 SO₂

From the reaction pressures, the standard free energy of the reaction was found to be:

ΔF⁰ = + 51,320 - 36.68 T

Using thermodynamic data for ZnSO₄, ZnS and SO₂ the standard free energy of formation of the basic salt ZnO·2ZnSO₄ was found to be:

ΔF⁰ = - 377,000 - 65.9 T cal/mole

in the temperature range 350 to 420⁰ C.

Above …

A Study Of The Relationships Between The Structure And The Consolidation And Swell Characteristics., Victor Foute Spruill

Masters Theses

"This paper reports the experimental results of an investigation of the relationships between the consolidation and swell characteristics of a cohesive soil and the structure of the soil. Consolidation and swell tests were run on samples prepared at their liquid limits in order to permit the effects of structure to show up in the results. The series of samples tested consisted of Putnam Clay Soil with (1) 2% sodium carbonate added, (2) no admixture, (3) 1% calcium hydroxide, and (4) 4% calcium hydroxide. Determinations were made of the per cent consolidation and per cent swell, decrease and increase in height …

Dissolution Rates Of Zone Refined Iron And Steel In Hydrochloric And Sulfuric Acids And In Sodium Chloride Solutions., Gary E. Welch

Masters Theses

"Dissolution rates for two carbon steels were deter­ mined in four concentrations of sulfuric acid at five temperatures and in four concentrations of hydrochloric acid at four temperatures.

No general relationship was found for the variation in activation energies in sulfuric and hydrochloric acid. An explanation of the difference in the reaction rates and a possible explanation of the activation energy is presented on the basis of chunk formation.

The results of this investigation indicate an electrochemical control mechanism for the dissolution reaction of steel in acid solutions.

Results of dissolution rate studies in sulfuric and hydrochloric acid solutions and …

Heat Transfer Through A Honeycomb Sandwich Panel, Jayantilal J. Darji

Masters Theses

"Progress brought about by human ingenuity and technological developments has been always accompanied by fresh problems, the successful solution of which enables still further progress.

The recent developments in space exploration and exploitations are astounding. The coming years are likely to bring forth many remarkable achievements. Except for several engineering problems encountered with these developments the pace of progress is to study the heat transfer from honeycomb sandwich panels as an outer skin of high performance flight vehicles. The quantity of heat transferred through the panel is important in study of such vehicles, and methods or equations for determining this …

Economical Span Length Ratios For Four Span Continuous Girder Bridges., C. C. Jogani

Masters Theses

"This study presents the results of an analysis of maximum movement in a four span continuous bridge with total span length of 100¹, 200¹, 300¹, and comparison with maximum moment on three span continuous bridge with total span length of 200¹ and 300¹. The four span continuous bridge was found to have a maximum moment which was 46% that of the three span bridge at both 200¹ and 300¹ length"-Abstract p. ii

The Effect Of Haunched Members On Vierendeel Trusses, Rashmikant D. Parikh

Masters Theses

"The purpose of this study was to analyze a Vierendeel Truss and determine the effect of haunches on moments. Loads were applied at the interior panel points in sequence. The classic slope-deflection method with coefficients taken from a table of frame constants (8) was used for the analysis.

In this investigation, one effect of haunches was determined to be the distribution of moments more evenly throughout the structure. Also, they insure rigidity of the joints and increase architectural flexibility"--Abstract, page ii.

The Reaction Of Sodium Iodide In Acetone With Halogenated Epoxides -- A Mechanism Study, Thomas E. Breuer

Masters Theses

"l-bromo-2,3-epoxybutane reacted with sodium iodide in acetone to give 3-iodo-l,2-epoxybutane in 70.1 per cent yield. 3-bromo-l,2-epoxybutane produced l-iodo-2,3-epoxybutane in 69.9 per cent yield when it was allowed to react with a solution of sodium iodide in acetone. No other product could be isolated after either reaction, although it is possible that another compound may have been produced in very small amounts. The iodoepoxides were oxidized to the corresponding α-iodoacid in approximately ninety per cent yield by silver oxide"--Summary, page 40.

Investigation Of Measures Of Ill-Conditioning, Thomas D. Calton

Masters Theses

“The object of investigation in this study is that of ill-conditioning in the solution of a system of linear equations. Ill-conditioning arises when the solution is very sensitive to small changes in the coefficients of the unknowns.

A study is made in this paper of the various proposed measures of ill-conditioning for the purpose of finding the most practical method or measure for determining whether a system is ill-conditioned.

The problem of near-singular or ill-conditioned systems is of great importance in the solution of linear systems because of the extensive use made of them in practical situations. Solution of a …

Methods For The Determination Of The Thermal Conductivity Of Solids., A. M. Sivadasan

Masters Theses

"The thermal conductivity of materials is of considerable practical and theoretical interest. Numerous publications on this subject have been presented with widely varying approaches and applications being made. Perhaps for no other thermal property are the published results so widely divergent and subject to such great uncertainty, particularly at high temperatures. This is partly due to unsolved difficulties in measurement, but perhaps to an even greater extent to the fact that the thermal conductivity of a material depends on its physical characteristics as well as some environmental factors such as humidity and temperature. In the case of metals or alloys, …

Stereoradiography As Applied To Problems Of Petrology., Martin Goldstone

Masters Theses

"Stereoscopic examination of radiographs of rock and ore samples allows a rapid, cursory determination of texture and structure without time consuming preparation and use of thin sections. In addition, volumetric estimates of known mineral components can be made providing they possess significantly different x-ray absorption characteristics.

Stereoscopic effect was most pronounced for specimens having well defined components of structure such as bedding, banding, lineation, inclusions, textural variations and moderate to large x-ray absorption differences. In general, these conditions were best met by ores or ore minerals with their related gangue minerals.

Stereoscopic examination was not successful in revealing twinning or …

Geology Of The Northern Half Of The Ellington Quadrangle Missouri., Robert Charles. Thornton

Masters Theses

"Geologic mapping has been completed for the northern half of the Ellington Quadrangle, Missouri. Rocks exposed in the thesis area are Precambrian and Paleozoic in age. The Precambrian rocks are granites and felsite. The Paleozoic rocks include the Potosi and Eminence Formations, of Upper Cambrian age, and the Gasconade Formation of Ordovician age. Distinction between the Potosi and Eminence Formations is difficult because of conformable and transitional relationships. In the thesis area sufficient evidence was available to separate the dolomites of the Potosi and Eminence as mappable units. This mapping should be useful as a basis for more detailed geologic …

A Study Of The Solubility Of Gold In Aluminum And The Extent Of The Al₂Au Phase., Kuldip Singh Chopra

Masters Theses

"The lattice constant of pure aluminum (99.998%) at 25° C 0 was determined to be 4.04953 A and the limit of solubility of gold in aluminum at 58O° c was found to be about o.4 weight percent gold. The minimum of the lattice constant was observed at O.75 weight percent gold. No change in the lattice constant with time was found.

The Al₂Au phase has a range from 77.66 to 78.94 weight percent gold with the theoretical composition of Al₂Au nearly in the middle of the phase. The thermal coefficient of expansion, the density and the …

Influence Of Porosity On The Fracture Stresses Of Electrical Porcelain., Edward Anton Snajdr

Masters Theses

"Spherical pores were induced in a typical quartz electrical porcelain body. Three levels of pore size and four levels of concentration were studied. Large strength sample sizes were employed using a three-point loading and diametral loading method. Data for induced quartz particles is also included"--Abstract, p.ii

The Construction And Evaluation Of A Small Scale Laboratory Fermentor For Batch And Continuous Studies., Robert Murray Logan

Masters Theses

"The purpose or this investigation was to design and construct a suitable apparatus for the aerobic culture or microorganisms to be used for preliminary batch studies and eventually, continuous fermentations.

The general design of the apparatus was patterned after small scale equipment described in the literature. Construction or the apparatus was carried out in the shop of the Department of Chemical Engineering and Chemistry. All of the necessary machining was done by the author.

The aeration-agitation system was evaluated by the use or the sulfite oxidation rate determination. The oxygen transfer rate provided by the apparatus was round to be …

Effect Of Stiffness Ratio On Stresses In A Rigid Frame., James Juh-Ling Tang

Masters Theses

"The elastic center method has been used to analyze several rigid frames with different geometric configurations and with component members of variable cross-sections. The basic approach is to divide the frame into small segments to solve this problem. From this analysis the best frame which is in the range of an economical design may be obtained for a given loading condition"--Abstract, p.2

Compensator Design For Unity Feedback Systems On The Digital Computer., Ping Liang

Masters Theses

"In control systems engineering it is frequently necessary to compensate a fixed plant whose transfer function cannot be changed. Usually the characteristics of the resulting system are established in terms of steady state and transient performance specifications. Generally it is necessary to insert a compensator which permits the system to satisfy the specifications as well as to provide an absolutely stable system.

In this thesis a method is developed to determine the transfer function of the compensator. Each system performance specification can be expressed in a differentiable inequality form composed of the system closed-loop gain, zeros, and poles. First, the …

Small Signal Gain Analysis For A Seven Cavity Klystron Amplifier., William E. Hord

Masters Theses

"The problem was to find a suitable method of using the digital computer to calculate the small signal gain characteristics of a seven cavity klystron amplifier. Background material relevant to the problem was reviewed. The differential equations for small signal conditions in a gridless gap klystron were developed. These equations were then solved and put in a matrix form suitable for digital computer analysis. Suggestions for additional development were proposed"--Abstract p. ii

A Study Of The Relative Electric Resistance Of Commercial Steels And Pure Iron, William Eugene Wistehuff

Masters Theses

"The change in relative electric resistance of five commercial steels, Armco Ingot Iron and Pure Iron were studied over the temperature range of 800°C to 1100°C in an attempt to correlate the phenomena of hot or red shortness with a change in the Electric resistance .

The results from the above resistance measurements were compared with mechanical tests of the same steels to show that at the point at which the iron sulfide liquid forms there is a definite change in the slope of the electric resistance vs temperature curve.

Also studied was a discontinuity in the electric resistance vs …

Interaction Curve For A Beam Column., Mahendra Khushalchand Sanghavi

Masters Theses

"The theoretical interaction curve for a circular section is established. Experimentally the interaction curve f or a beam-column with a varying circular cross section, is established. The effect of stress history is discussed, and the comparisons of different interaction curves are made"--Abstract p.i

Derivation Of A Method To Determine Reactions And Deflection Of A Continous Beam On An Elastic Foundation, Louis Richard Fuka

Masters Theses

“The purpose of this thesis is to develop a method for determining the reactions and deflection curve of continuous beams partially supported by an elastic foundation. The method involves representation of an arbitrary loading and the intermediate redundant reactions as Fourier Series. Redundant intermediate reactions are determined by the solution of an equal number of linear equations. The remaining reactions are determined by the application of statics.

This same method can be used for simply supported beams on an elastic foundation and for continuous beams without an elastic foundation”--Abstract, page ii.

An Engineering Evaluation Of Surficial Soils Of Dent County, Missouri, William L. Durham

Masters Theses

“This study is the report of an investigation to: Determine the engineering characteristics of Dent County, Missouri soils using a pedologic soil association map for areal extrapolation of soil test data; and, Evaluate the feasibility of determining the engineering characteristics of all Ozark Region soils by the same method.

During the course of the study, the geology and pedology of the county was investigated and a sampling and testing program formulated. Pedologic soil types in each soil association area were sampled, tested in the laboratory, and the results interpreted.

The results obtained showed that the engineering characteristics of the soil …

The Separation Of Strontium-90 From Cesium-137 And Fractionation Of Rare Earth Elements By Liquid-Liquid Extraction., Surendra D. Khanna

Masters Theses

No abstract provided.