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Column Research Council: Proceedings 1975, Column Research Council

CCFSS Library (1939 - present)

One of the objectives of the Column Research Council is to hold an annual technical session with the view of presenting for evaluation problems relating to the design and behavior of columns and other compression elements in metal structures. The 1975 Proceedings contain summaries of papers presented at the technical session held on March 6-7, 1975 in Toronto Canada. A register of those who actively participate in the work of the Council, a financial statement, related publications and the Council By-Laws are also recorded.

Sun, Sand And Water: A History Of The Jacksonville District U.S. Army Corps Of Engineers 1821-1975, George E. Buker

Books

A history of the Jacksonville district of the U. S. Army Corp of Engineers and their challenges to develop Jacksonville as a viable harbor and intracoastal waterways from 1821-1975

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 …

Conference Proceedings Of The 4th Biennial Symposium On Turbulence In Liquids, University Of Missouri--Rolla

Symposia on Turbulence in Liquids

No abstract provided.

On The Role Of Conditional Averages In Turbulence Theory, R. J. Adrian

Symposia on Turbulence in Liquids

It is shown that conditional averages in the form of expected values of functions of the velocity at an arbitrary point given the velocities at a finite number of distinct points, appear naturally in certain types of turbulence theories and that the closure problems in such theories ultimately reduce to the approximation of these averages. Two exemplary theories are considered. The first is characteristic of turbulence models formulated in terms of probability density functions whereas the second is related to the derivation of optimal algorithms for the numerical integration of the turbulent Navier-Stokes equations at large Reynolds numbers. Some mathematical …

Mechanical Degradation Of Dilute Solutions Of High Polymers In Capillary Tube Flow, John D. Culter, Jacques L. Zakin, Gary Kent Patterson

Chemical and Biochemical Engineering Faculty Research & Creative Works

Experimental results on mechanical degradation in capillary tubes of polyisobutylene polymers in dilute solution are described. In laminar flow, degradation is independent of tube length, indicating that entrance effects are dominant. This shows that capillary experiments do not yield explicit information on the effect of shear stress on mechanical degradation. In turbulent flow, large entrance effects are also observed, but some degradation does take place in the fully developed flow region. Copyright © 1975 John Wiley & Sons, Inc.

Quantitative Overdesign Of Chemical Processes, R. A. Freeman, J. L. Gaddy

Chemical and Biochemical Engineering Faculty Research & Creative Works

Overdesign is applied to chemical processes to account for expected variations in the design data or design conditions. These variables must be treated quantitatively in order to design a process that is certain to perform adequately. Process dependability is introduced as a means of quantifying variable process behavior. Overdesign using the dependability criterion is a stochastic optimization problem. An example problem with three stochastic variables and two design variables is presented to illustrate these procedures. Copyright © 1975 American Institute of Chemical Engineers

Thermal Stresses In A Sphere Due To Local Heating Followed By Complete Cooling, T. S. Chen, K. Thirumalai, J. B. Cheung

Mechanical and Aerospace Engineering Faculty Research & Creative Works

No abstract provided.

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

Scattering Of Light Atoms From Strongly Periodic Surfaces, J. G. Stoll, Jr., Ralph E. White, J. J. Ehrhardt, R. I. Masel, J. P. Merrill

Faculty Publications

No abstract provided.

Electrochemical Reduction Of Molybdate In The Presence Of Zinc Chloride In Molten Lithium Chloride-Potassium Chloride Eutectic, R. Cvetkovic, Branko N. Popov, H. A. Laitinen

Faculty Publications

Two chronopotentiometric waves were observed for the electrochemical reduction of molybdate in the presence of zinc chloride, with quarter-wave potentials of –1.5V and –1.75V vs. the Pt(II)/Pt reference electrode, respectively. It was observed that an increase in the molybdate concentration causes a decrease of the first transition time indicating a chemical reaction between ZnCl₂ (which is reduced at –1.5V) and Li₂MoO₄ in the melt forming ZnMoO₄ which is sparingly dissociated in LiCl-KCl eutectic. The equilibrium constant for the observed reaction was calculated. X-ray powder diffraction patterns of the reduction product of ZnMoO₄ have been …

A Seismic Investigation Over A Near-Surface Cavern, Richard D. Rechtien, David M. Stewart

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

A field experiment was conducted over a near-surface cavern with the principal objective of obtaining a spatial definition of the associated Cavity Resonance phenomenon, as reported by Watkins et. al. (1967) and by Godson and Watkins (1968). The results of the experiment were inconsistent with those of the earlier investigators in that all seismic events recorded in the vicinity of the cavity, having vertical velocity components, could be readily identified as standard modes of seismic wave transmission. A persistence of strong horizontal motion was observed for late record times. This horizontal motion was consistently oriented parallel to the cavity boundary, …

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 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

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 …

Characterization Of Two Mexican Raw Dolomites For Refractory Brick Production, Rodolfo Trevino Cantu

Masters Theses

"Two Mexican dolomites were characterized in order to discover their suitability for production of refractory brick.

The results were compared with other dolomites from American Companies. Some samples were burned in a gas fired Laboratory Furnace and others were obtained in the burned state after processing in Industrial Rotary Kilns.

The characterization procedures included X-Ray Diffraction, Scanning Auger Microprobe, DTA and TGA techniques, Chemical Analysis and Bulk Density measurements.

The procedure to control the quality of the dead-burned dolomite at the industrial level was established taking as the main criteria, bulk density, hydration susceptibility, and impurity levels"--Abstract, page ii.

The Development Of A Selection Model For Coal Conversion Processes., Karen Aldridge Dollar

Masters Theses

"Present research endeavors involving coal conversion technology have encompassed comparisons of the processes on the basis of economics or efficiency. These comparisons lack completeness because many intangible factors pertinent to the evaluations of the processes have been ignored.

A model has been developed to aid in the selection of the optimum coal conversion process for a given situation. The model includes a method for the evaluation of quantifiable factors which affect the decision-making procedure, and also includes methods by which the non-quantifiable factors which are important to the situation may be evaluated. This is a more complete form of decision-making …

Measurement Of Growth Rate To Determine Condensation Coefficients For Water Drops Grown On Natural Cloud Nuclei., A. M. Sinnarwalla, Darryl J. Alofs, J. C. Carstens

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Growth Rate Measurements Were Made for Water Drops Grown on Nuclei in Atmospheric Air Samples Taken in Rolla, Missouri. Rolla, Having a Population of 15,000 and Very Little Industry, is Relatively Free of Urban Pollutants. the Measurements Were Made in a Vertical Flow Thermal Diffusion Chamber at Supersaturations of 0. 5 and 1%. the Time to Grow from Near Dry Radius to the Final Radius (6 to 7. 5 Mu M) Was Measured. If One Assumes the Thermal Accomodation Coefficient is Unity, the Measurements Indicate an Average Value of 0. 026 for the Condensation Coefficient. the Temperature Ranged from 22. …