Engineering Commons^™

Intrinsic Viscosity Studies Of Linear Polyethylene Fractions In Good And Poor Solvents, J. S. Chiang, J. L. Zakin, Kenneth G. Mayhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

No abstract provided.

Modified One‐At‐A‐Time Optimization, Marshall E. Findley

Chemical and Biochemical Engineering Faculty Research & Creative Works

An optimization method has been developed that searches one variable at a time under the conditions that previously searched variables are at their approximate optimum and variables to be searched later are constant. This method provides the optimum and also information on the effects of the variables. The method is based on the Partan and Powell methods and on assuming linear partial derivatives of the objective function with respect to any given variable. The procedure involves searching each variable separately with other variables either constant or varied so that they remain at their estimated optimum for the given conditions. This …

Structure Of High-Internal-Phase-Ratio Emulsions, K. J. Lissant, B. W. Peace, S. H. Wu, K. (Kenneth) G. Mayhan

Chemical and Biochemical Engineering Faculty Research & Creative Works

No abstract provided.

Hybrid Carrier And Modulation Tracking Loop Performance In Rfi, Rodger E. Ziemer, Donald R. Nelson

Electrical and Computer Engineering Faculty Research & Creative Works

The operation of a hybrid Tracking (HT) phase-locked loop (PLL) in radio-frequency interference (RFI) is considered. Results from a perturbation analysis for the loop phase error in continuous-wave (CW) RFI are found to compare favorably with results obtained by digital computer simulation. These results, together with simulation results for wide-band (in comparison to the loop bandwidth) RFI, indicate that loop structures which track both on the signal carrier and modulation components are advantageous in RFI plus Gaussian noise backgrounds. Copyright © 1974 by The Institute of Electrical and Electronics Engineers, Inc.

A Geohydrologic Study Of The St. Francois County Regional Sanitary Landfill., Kent David Gastreich

Masters Theses

"The St. Francois County Sanitary Landfill is a 503.8-acre site located 1n the Old Lead Belt area of southeast Missouri. The landfill, which was opened in July 1973., is being operated by the non-profit St. Francois County Environmental Corporation. The site is largely covered by up to 80 feet of tailings finely ground dolomite of the lower Bonne Terre Formation., wh1ch are a product of decades of lead mining and milling at the Deslodge, Missouri, Mine. The landfill 1s surrounded on three sides by the Big River. Approximately 36,000 people are being served by the landfill which takes in about …

Two Dimensional Radiant Interchange Between Two Isothermal Semi-Infinite Parallel Strips., Stanley Earl Mckinney

Masters Theses

"Four straight forward solution methods were used to determine the two-dimensional variation of the radiosity on two identical constant temperature, gray, semi-infinite parallel strips. Physical convergence parameters were developed for the one-dimensional case and extended to two dimensions. A study using these parameters was undertaken to identify the preferable method. The solutions obtained with this "best method" agree well with the one-dimensional solutions. The error is estimated to be less than one percent" -- Abstract, p. ii

Towards A Design Of Hmo, An Integrated Hardware Microcode Optimizer, James Oliver Bondi

Doctoral Dissertations

"This paper discusses an algorithm for optimizing the density and parallelism of microcoded routines in micro-programmable machines. Besides presenting the algorithm itself, this research also analyzes the algorithm's uses, design integration problems, architectural requirements, and adaptability to conventional machine characteristics. Even though the paper proposes a hardware implementation of the algorithm, the algorithm is viewed as an integral part of the entire microcode generation and usage process, from initial high-level input into a software microcode compiler down to machine-level execution of the resultant microcode on the host machine. It is believed that, by removing much of the traditionally time-consuming and …

A Finite Element Method For Three-Dimensional Analysis Of Metal Forming, Nguyen Don Phu

Doctoral Dissertations

"The importance of metal forming by extrusion was reviewed. A Finite Element Approach was developed to analyze extrusion processes. A brick type linear element and the Upper Bound theorem were used to analyze the extrusion of a cylindrical billet into a square cross-section prism. A minimization technique for a non-linear functional with linear constraints was developed. Different types of boundary conditions were also formulated. A frictionless extrusion was simulated using the computer program developed. Velocity profiles at different sections of the deforming solid were obtained and an average extrusion pressure was predicted for a given area reduction ratio.

Extrusions from …

A Study Of The Feasibility In Obtaining The Kinetics Of Various Ordering Phenomena Of The Iron Aluminum System Utilizing The Mössbauer Effect, Lloyd Rollan Chapman

Masters Theses

"The determination of the kinetics of ordering for various ordering phenomena of the Iron-Aluminum system utilizing exclusively the Mössbauer effect technique is shown to be infeasible for all but a highly restrictive consideration from experimental as well as theoretical evidence. Also, the possible use of the Mössbauer effect for the analysis of other ordered systems is discussed.

An alternative method for the acquisition of the needed information utilizing diffraction and Mossbauer techniques is presented recognizing the need for a computer fitting analysis of the complex Mössbauer effect spectra. However, at this stage of investigation, no experimental work has been performed …

The Effects Of Washout In Polydispersed Metalic Aerosols, Jerry N. Burford

Masters Theses

"Experimental Collection Efficiencies are presented for drops of approximately 0.1cm radius falling through aluminium, magnesium and molybdenum oxide polydispersed aerosols. The experimentation was conducted in two identical cylindrical chambers, one being used for aerosol washout, and the other for allowing the aerosol to decay normally. The Collection Efficiency data were thus determined by comparing the aerosol concentration changes in the two chambers. The rather strong effects that induced micro-turbulence and relative humidity have on aerosol collection and aerosol decay were observed and are discussed"--Abstract, page ii.

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 …

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 …

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 …

Effect Of Sweeping Sinusoidal Excitation On Nonlinear Dynamic Systems., Md. Mosharraf Hossain

Masters Theses

"The response of viscous damped, cubic spring systems to excitations having exponentially varying frequency cannot be written in a closed form. This report summarizes a numerical investigation of hardening and softening cubic systems influenced by these excitations and provides information concerning the effects of varying viscous damping, system nonlinearity, and excitation sweep rate on system behavior near resonance. Results are reported in terms of maximum response attained during sweeping and the frequency at which maximum response occurs.

It has been found that if hardening cubic systems are subjected to sweeping excitations wherein the frequency sweeps down through resonance, the maximum …

Propane-Carbon Dioxide And Propylene-Carbon Dioxide Mixture Adsorption In 5a Molecular Sieves., Bui Van Hong

Masters Theses

"Measurements of the adsorption on SA molecular sieves have established that at 1 atmosphere and 24.0°c, both systems, propane-carbon dioxide and propylene-carbon dioxide, form ideal solution adsorbed phases. Total mass adsorbed ranges from 112 to 207 milligrams/gram sorbent for propane-carbon dioxide and from 130 to 207 milligrams/gram sorbent for propylene-carbon dioxide"-- Abstract, p. ii

Bidding And Negotiation Of Government Funded Contracts With Inflationary Considerations., David Thurman Hearst

Masters Theses

"The traditional government contract type has played an important role in the economy of the United States. In its most used type, that of fixed price, it represents a stabilizing factor in the cycles of the business world. However, recently this type of contract has been affected by the nation's most recent plague, double-digit inflation.

Inflation attacks almost all phases of stability in the economy and in contract negotiations and bidding techniques. It erodes the monetary unit of the economy, distorts forecasting models, and creates potential ruin for contractors due to uncertainty in costs.

Research pertaining to government funded contracts …

The Geology And Hydrogeology Of The New Lead Belt, Missouri, Charles Scott Fletcher

Masters Theses

"In order to analyze the effects of pumping groundwater from underground lead mines upon present groundwater resources of the New Lead Belt area, the geology and hydrogeology of that area must first be determined. The primary method of investigation of this analysis was interpretation of ecologic and hydrogeologic data taken from water well logs and mineral exploration well logs, with supplemental information supplied by published and unpublished literature sources. From all these sources of data, structural contour maps of the Precambrian erosional surface; the tops of the Lamotte, Bonneterre, and Davis Formations; isopachous maps of the Davis and the Lamotte/Bonneterre …

2.5 Ampere Dc Solid State Power Controller, John Anthony Gilbert

Masters Theses

"The 2.5 Ampere DC Power Controller presented in this paper is a device which combines the properties of both relays and circuit breakers solely by means of solid state circuitry to perform the power functions that (1) provide DC power to electrical loads by means of power transistor switching, and (2) provide electrical protection by generating trip out characteristics similar to those of thermal circuit breakers. Furthermore, the control of this device is completely computer compatible, i.e., it is commandable from digital logic levels.

The text of this report discusses the requirements, specifications, and design of this power controller. In …

A Comparative Analysis Of The Capabilities Of Three Stereo Radar Techniques When Operating In The Presence Of System Errors, George L. Bair

Masters Theses

"Three stereo radar techniques for producing stereo images from which topographic data and maps may be obtained are described and their performance in the presence of system errors is determined. The techniques are: an improved single flight technique which uses a combination of two antenna beam characteristics which permits terrain illumination from nearly the same aircraft position, a previously proposed single flight technique which uses two horizontal linear arrays generating vertical fan beams at different azimuth angles, and an existing two flight technique which uses a horizontal array generating a side-looking fan beam.

Error analyses are performed to determine the …

A Digital Simulation Of The Statistical Properties Of Ionospheric Scintillation, William Frederick Deckelman

Masters Theses

"This thesis shows that a bandlimited bivariate-normal time series is a useful model for the envelope of scintillating radio signals traversing the ionosphere. A software computer model is designed and its parameters varied to obtain good fits of the fade duration distribution of the time series generated by the model with that of an actual block of ionospheric scintillation data. The power spectrum of the actual time series corresponding to the in-phase and phase quadrature components of ionospheric scintillation is shown to lie between that of a first- and second-order Butterworth filter through comparison with model generated data"--Abstract, page ii.

A Computerized Simulation Of A Personal Rapid Transit System., James Richard Cromer

Masters Theses

"The movement of people from an origin to a destination has become a complex and sometimes severe problem, The present modes of transportation available, which include the rapid rail systems, bus transit service, and the personal automobile, have proven quite ineffective in dealing with the situation, A new concept in the transportation area is that of Personal Rapid Transit (PRT). This concept offers a promising solution to many of our people and goods movement difficulties. Before this new system can be implemented it is necessary that various design, construction, and operational criteria be evaluated to determine the optimal system to …

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 …

Design And Operation Of A System For The Measurement And Display Of A Railroad Train Length., Paul Clement Kriegshauser

Masters Theses

"This thesis describes the design, operation, and application of a system for the automatic measurement of a railroad train length. The system is based on sensing individual wheel crossings with two commercial variable-reluctance wheel sensors. The individual wheels are not counted as they are sensed, instead the system uses the information to compute the train velocity. These sensors are separated a known distance on the railroad track at the location a length measurement is desired. The train may pass these sensors at any desired speed and in either direction. The developed system is not dependent on car length or number …

Studies On The Yield And Rate Of Lysine Production Using Brevibacterium Lactofermentum., Ho Bao Nhan

Masters Theses

"The production of lysine by a microbial method was studied. Brevibacterium lactofermentum (ATCC 21086) was used to accumulate lysine. T1\ese experiments were done in shake flasks and a 7.5-liter fermentor.

Lysine and residual glucose were determined at fixed intervals of time during each run. Cell counts were also made for some experiments. Temperature and pH were kept constant during the runs and dissolved oxygen was recorded continuously.

The effects of casamino acid, soy peptone, certain amino acids, glucose and agitation on the rate of production and the yield were studied. It appears that reducing any one of the variables will …

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; …

Study Of Techniques For Designing Large Digital Systems Interactively., Harold Dale Puls

Masters Theses

"FLOWWARE [1-4] is an interactive register transfer language based upon the concept of flowcharting. The graphic nature of the language, however, generates a few disadvantages when it is used on a large design. Changes have been made to the basic FLOWWARE package to aid the user in specifying and displaying his design. In addition, responsibility for the design has been shifted to the remote large computer to lessen the size requirement on the local minicomputer"--Abstract, p. ii

A Training Simulation For Rural Electric Cooperative Staff., David F. Larcker

Masters Theses

"The simulation described in this thesis can be applied as a training tool to teach the management personnel of rural electric cooperatives the elements of decision making in a dynamically interreacting business environment. Initially, the major managerial problem areas of a typical rural electric cooperative were identified. These stimulated the development of a training simulation which realistically embodied the alternatives available to management personnel during the various stages of decision making. The final simulation design was a board type of game able to provide the feedback necessary for a learning experience" -- Abstract, p. ii

Two-Dimensional Radiative Transfer In Semi-Infinite Isotropically Scattering Medium., Thomas Lee Linsenbardt

Masters Theses

"Two-dimensional radiative transfer in a semi-infinite medium has been investigated. The medium was considered to be homogeneous, absorbing, non-emitting, and isotopically scattering. Cosine, step, and finite strip variations of collimated and diffuse incident radiation were considered. Collimated incident radiation was restricted to lie in planes perpendicular to the direction of its spatial variation.

Expressions for source functions, fluxes, and intensities at the boundary and inside the medium were obtained by assuming cos foe varying incident radiation. This assumption allowed the two-dimensional problem to be reduced to a one-dimensional integral equation for the source function. This integral equation vias transformed into …

Deformation Of A System Of Clamped Thin Circular Plates With Liquid Filled Interspace., Archie Forrest Gatrost

Masters Theses

"In this work the behavior of a system of thin, circular clamped plates with liquid-filled interspace in a variable pressure environment was investigated. Six plates separated by liquid-filled chambers were arranged in alternate layers in a clamping device and a pressure was applied on one side of the six plate system. The deformation of each plate and the pressure distribution from the high pressure to low i i pressure side was measured. The plate deformation was measured by a strain gage attached at the apex of each plate and the chamber pressure by a strain gage pressure transducer.

The results …