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Articles 31 - 60 of 130
Full-Text Articles in Engineering
The Modeling, Fabrication, And Testing Of An Instantaneous Torque Measuring System, Thomas Phillip Hertel
The Modeling, Fabrication, And Testing Of An Instantaneous Torque Measuring System, Thomas Phillip Hertel
Masters Theses
"The purpose of this work was to obtain a measuring system to experimentally determine the instantaneous magnitude and frequency of the torques from zero to 2400 Hertz produced by a single phase motor. This paper explains the methods employed in designing and fabricating a measuring system and shows the results from tests using this equipment. It was found that a measuring system based on the determination of the instantaneous value of the stator's reaction torques could be realized. Also, it was found that some simple methods of computation could be used to find the magnitudes of the frequency components comprising …
A Direct Method Of Measuring Stray Load Loss In Dc Machines, Kanaiyalal R. Shah, George Mcpherson
A Direct Method Of Measuring Stray Load Loss In Dc Machines, Kanaiyalal R. Shah, George Mcpherson
Electrical and Computer Engineering Faculty Research & Creative Works
Stray load loss in dc machines is denned as the difference between the actual loss under load and the well-recognized loss. This paper describes a simple, reliable, and direct method of measuring this loss by means of a proposed short-circuit test with a correction factor for uncompensated-type dc machines. It also describes the sources and components of stray load losses as they occur under short-circuit test. Copyright © 1968 by The Institute of Electrical and Electronics Engineers, Inc.
A Simple Design Algorithm For Synthesis Of Multilevel Combinational Networks, James H. Tracey
A Simple Design Algorithm For Synthesis Of Multilevel Combinational Networks, James H. Tracey
Electrical and Computer Engineering Faculty Research & Creative Works
An algorithm is presented for the synthesis of combinational networks with a constrained arrangement of ANDS, ORS, NANDS, NORS, and inverters. The algorithm is easily presented to students in an introductory logic design course and has considerable application in modern practical logic design. Many texts available for a first course in logic design give very limited practical guidance for synthesis of networks under constraints outlined here. It is suggested that the algorithm presented here be furnished as supplementary material in the introductory course. Copyright © 1968 by The Institute of Electrical and Electronics Engineers, Inc.
A Novel Method For Solving The Uniform Distributed Network Analysis Problem, Robert C. Peirson, Edward C. Bertnolli
A Novel Method For Solving The Uniform Distributed Network Analysis Problem, Robert C. Peirson, Edward C. Bertnolli
Electrical and Computer Engineering Faculty Research & Creative Works
An application of the Laplace transform method of Ogata to the solution of the uniform distributed network analysis problem is described. Copyright © 1968 by The Institute of Electrical and Electronics Engineers, Inc.
Recombination Statistics For Neutron Bombarded Silicon Transistors, M. C. Chow, J. L. Azarewiczt, C. A. Goben
Recombination Statistics For Neutron Bombarded Silicon Transistors, M. C. Chow, J. L. Azarewiczt, C. A. Goben
Electrical and Computer Engineering Faculty Research & Creative Works
This paper presents a recombination statistical model for the neutron-induced base current component reported previously. The derivation was based on the following: 1) the current equation for the induced current component developed previously; 2) the Shockley-Read-Hall statistics for holes and electrons; and 3) the recombination statistics derived by Sah, Noyce and Shockley for sites in the bulk space-charge region. The recombination statistics model depends on the diffusion potential, the junction voltage, the activation energy, temperature, and the ratio of capture cross-sections for holes and electrons. The utility of such a recombination statistical model is illustrated by using measured parameters to …
Radiation And Annealing Characteristics Of Neutron Bombarded Silicon Transistors, L. S. Su, G. E. Gassner, C. A. Goben
Radiation And Annealing Characteristics Of Neutron Bombarded Silicon Transistors, L. S. Su, G. E. Gassner, C. A. Goben
Electrical and Computer Engineering Faculty Research & Creative Works
Operating a silicon planar epitaxial transistor in the inverse configuration allows one to demonstrate clearly the importance of the neutron-induced base current component and its degradation of the emitter efficiency, and, because of the much larger depletion layer, to compute a volume dependent damage constant applicable to all silicon p-n junctions. The importance of minimizing the absolute change versus relative change in radiation hardening studies is clearly illustrated. Surface effects were found to be significant for transistors mounted in gas-filled cans. The diffusion potential was predicted, on theoretical grounds, to vary with neutron fluence, and the theory was experimentally confirmed. …
Electric Field Investigations And A Model For Electrical Liquid Spraying, Wallace E. Deshon, Ralph S. Carson
Electric Field Investigations And A Model For Electrical Liquid Spraying, Wallace E. Deshon, Ralph S. Carson
Electrical and Computer Engineering Faculty Research & Creative Works
The equation generally used for determining the electric field at the liquid tip in electrical spraying of liquids was originally derived for determining the electric field around a metal tip in the extraction of electrons from metals. In the present paper experimental data were taken at the instant of spraying to determine the validity of using this equation for liquid tips. the results indicate that the value of electric field given by this equation needs to be increased by about 20% in the normal range of operation. A model for the spraying mechanism of the liquid is also presented. © …
Distributed Parameter Rc Network Analysis, Robert C. Peirson
Distributed Parameter Rc Network Analysis, Robert C. Peirson
Doctoral Dissertations
"Methods of analyzing uniform and tapered distribute [sic] parameter RC networks are reviewed and correlated in this dissertation. Multilayer networks and simple three layer networks are considered. Analogies between two-wire transmission line theory and multilayer distributed network theory are developed, i.e., standing wave and traveling wave concepts. An accurate computer-aided steady state analysis procedure is presented which has a solution accuracy that can be determined prior to actual analysis computations. The impulsive response of the uniform RC network is investigated with the goal of measuring the network's parameters. Procedures to determine the parameters R and C of a uniform RC …
Investigation By Neutron Diffraction Utilizing White Neutron Radiation, Arlen Ray Schade
Investigation By Neutron Diffraction Utilizing White Neutron Radiation, Arlen Ray Schade
Doctoral Dissertations
"The most probable reactor core neutron velocity was determined by analysis of data obtained from single crystals of copper and lithium fluoride. Derivation of the relationship between the maximum in experimental count rate and the most probable velocity, an error analysis of the method, and the computer routine are given for the method used to obtain the most probable velocity. The most probable velocity was used to index the maxwellian distributions from polycrystalline materials. Investigations were done with white neutron radiation of various silicon steel samples of different preferred orientation. A method is described by which the preferred orientation of …
Recombination Statistics For The Neutron-Induced Base Current Component, Ming-Chwan Chow
Recombination Statistics For The Neutron-Induced Base Current Component, Ming-Chwan Chow
Doctoral Dissertations
"This paper presents a derivation of the recombination statistical model for the neutron-induced base current component. The derivation was based on the assumptions: 1) the current equation for the induced current component developed by Goben is valid; 2) the Shockley-Read-Hall statistics for holes and electrons are applicable; and 3) the recombination statistics derived by Sah, Noyce and Shockley, for sites in the bulk space-charge region are valid. Several examples were presented to emphasize accuracy of this derived model for predictions. This paper shows that the recombination process may be described by a mathematical model, recombination statistics which depend on the …
Determination Of Molecular Diffusivities In Liquids, Pai-Chuan Wu
Determination Of Molecular Diffusivities In Liquids, Pai-Chuan Wu
Masters Theses
"A porous plate, initially at a uniform solute concentration is immersed in a well-stirred pure solvent bath of known volume. It is desired to find the molecular diffusivity of the solute-solvent system by observing the change of the solute concentration in the solvent bath with time. In this study, concentration-time data were curve-fitted by non-linear, least squares techniques to the various mathematical solutions describing molecular diffusion in the porous frit. This technique is used to determine the diffusion coefficient and predict the value of other parameters existing in the different mathematical diffusion models. The results from the different models are …
Impulse Response Of Rc Exponential Lines, Oscar Gojon
Impulse Response Of Rc Exponential Lines, Oscar Gojon
Masters Theses
"This thesis presents an application of the analysis of the n-wire exponential line to the case of the 3-wire RC exponential line terminated in its characteristic impedance, and to the 2-wire exponential line with open and short circuit terminations. These lines are excited with Δ-function voltage generators, and the corresponding impulse responses are obtained"--Abstract, Page ii.
Electric Field Investigations And A Model Of Electrical Spraying Of Liquids, Wallace Deshon
Electric Field Investigations And A Model Of Electrical Spraying Of Liquids, Wallace Deshon
Masters Theses
"The equation E = [2 V] [over] [N 1n(4d/N] has been used for determining the electric field at the liquid tip in electrical spraying of liquids. Data were taken at the instant of spraying in an attempt to experimentally verify this equation. The results indicate that the value given by the equation needs to be increased by about 20% in the normal range of operation. A model for the spraying mechanism of the liquid is also proposed"--Abstract, page ii.
Zap - A Computer Program To Predict Fission Product Concentrations As A Function Of Neutron Flux, Irradiation And Cooling Times, Bruce Earl Koopmann
Zap - A Computer Program To Predict Fission Product Concentrations As A Function Of Neutron Flux, Irradiation And Cooling Times, Bruce Earl Koopmann
Masters Theses
"The development of a computer code was undertaken to calculate the fission product nuclide concentration for spent fuel discharged from a nuclear reactor, as a function of irradiation time, cooling time, neutron flux, and element cross section. The necessary input data was prepared from the basic nuclear data for fission of uranium-235 and plutonium-239. Calculations are also made for total or selective element beta heating and total gamma flux according to user selected input groups. These calculations would be useful in fuel element shielding, cooling, shipping and processing studies"--Abstract, page ii.
Analytical And Experimental Methods For Determining The Properties Of Materials At Very High Rates Of Loading, A. G. Behring
Analytical And Experimental Methods For Determining The Properties Of Materials At Very High Rates Of Loading, A. G. Behring
Masters Theses
"In the following report, some of the properties of ALCOA 7075 T651 aluminum, when subjected to high rates of loading, are experimentally investigated by impacting two rods of the material longitudinally. One rod is accelerated to a uniform velocity with an air gun launcher. The stationary second rod is instrumented with strain gages on its lateral surface in order to determine the strain-time history following impact. A detailed description of the experimental equipment is included. Simple, one-dimensional theory is used to determine the dynamic, elastic modulus of the test material under the impact condition. Several observations regarding the behavior of …
Kinetics Of The Formation Of Strontium Zirconate, W. H. Parker
Kinetics Of The Formation Of Strontium Zirconate, W. H. Parker
Masters Theses
"The decomposition rate of strontium carbonate (SrC0₃) was measured using a TGA apparatus. It was found to deviate slightly from zero order classical reaction. The rate of formation of strontium zirconate (SrZr0₃) from zirconium oxide (ZrO₂) and strontium oxide (SrO) in the form of the decomposition product of SrCO₃ was measured using quantitative x-ray diffraction for mineralogical analysis. It was found to most nearly follow the Zhuravlev-Lesokhin-Tempel' man rate equation. The rate of decomposition of strontium carbonate was found to be more rapid than the rate of formation of strontium zirconate such that for the most part strontium oxide is …
Prediction Of Drag Reduction With A Viscoelastic Model, Gary Kent Patterson, J. L. Zakin
Prediction Of Drag Reduction With A Viscoelastic Model, Gary Kent Patterson, J. L. Zakin
Chemical and Biochemical Engineering Faculty Research & Creative Works
No abstract provided.
Numerical Differentiation Of Equally Spaced And Not Equally Spaced Experimental Data [3], Harry C. Hershey, Jacques L. Zakin
Numerical Differentiation Of Equally Spaced And Not Equally Spaced Experimental Data [3], Harry C. Hershey, Jacques L. Zakin
Chemical and Biochemical Engineering Faculty Research & Creative Works
No abstract provided.
Drag Reduction In Hydrocarbon Soap Solutions, Ian Radin
Drag Reduction In Hydrocarbon Soap Solutions, Ian Radin
Masters Theses
"Turbulent flow pressure drop measurements were made for solutions of aluminum dioleate (soap) in toluene at concentrations of 0.2, 0.5, 0.75 and 1.0 per cent. Tube diameters ranged in size from 0.01 to 2.0 inches. The results of these measurements differed from those observed in aqueous systems. Higher concentrations (at least 0.75 per cent) were required before drag reduction was observed. Although fresh solutions were somewhat sensitive to shearing, once a solution was over about two weeks old it showed little further mechanical degradation. Although in the toluene solutions, wall shear stresses were reached which were over an order of …
Compressive Creep Of Basic Refractories, Maurice E. Green
Compressive Creep Of Basic Refractories, Maurice E. Green
Masters Theses
"The microstructure and mineralogical composition of direct bonded, 50 wt.% magnesia - 50 wt.% chrome ore refractory compositions containing controlled additions of silica were correlated with their compressive creep behavior in the temperature range 1450⁰ to 1550⁰C under stresses of 100 to 175 psi. Steady state creep rates were determined from the linear regression of the steady state regions of deformation on time. Apparent activation energies and deformation flow characteristics were determined from the temperature and stress dependence of the steady state creep rates. Silica contents up to 3.5 wt.% increased the amount of direct intergranular bonding which decreased the …
Spacing Of Explosive Charges, Calvin J. Konya
Spacing Of Explosive Charges, Calvin J. Konya
Masters Theses
"It is generally believed that the spacing of simultaneously initiated collar primed multiple charges is not dependent on the charge length. The stresses generated by explosive charges have been assumed to propagate through a material in a cylindrical manner. this assumption implied that the stress generated in any plane along the charge diameter would have been uniform in magnitude and direction. A finite explosive velocity along with a conical stress wave causes the stresses near the collar to differ from those farther down the column. for this reason, the spacing of charges would be dependent on charge length. An experimental …
The Decomposition Of 5-Hydroxymethyl-2-Furaldehyde Under Gamma Irradiation, William George Bowles
The Decomposition Of 5-Hydroxymethyl-2-Furaldehyde Under Gamma Irradiation, William George Bowles
Masters Theses
"An investigation into the effects of gamma irradiation decomposition of 5-hydroxymethyl-2-furaldehyde (HMF) revealed HMF to be resistant to radiation catalyzed decomposition. A 1.0 normal solution of HMF was irradiated at a dose rate of 4.1 x 10⁵ Rads/hr to a total dose of 8.2 x 10⁶ Rads from a 5000 Curie ⁶⁰Co source. a total of 31 per cent of the HMF decomposed in a zero order reaction, although it was found the HMF decomposed completely under cadmium shielded irradiation in a nuclear reactor with some neutrons present. The reaction rate constant was found to be 4.8 x 10⁻³ moles …
Fast Neutron Induced Resistivity Changes In Order-Disorder Fe₃Al, Bruce A. Betts
Fast Neutron Induced Resistivity Changes In Order-Disorder Fe₃Al, Bruce A. Betts
Masters Theses
"Resistivity measurements were made of ordered, disordered and intermediate states of order-disordered specimens of Fe₃Al while being irradiated by neutrons. All the specimens were irradiated at ambient temperature, approximately 35°C in a modified Bulk Shielding Swimming Pool type reactor. The ordered and near ordered specimens increased in resistivity indicating disordering whereas the disordered and near disordered specimens decreased in resistivity indicating an ordering process was occuring [sic]. By extrapolation, an equilibrium condition was determined and estimated at 130-135 micro-ohms-cm resistivity that would remain constant during irradiation because the ordering and disordering affects of neutron irradiation would be in equilibrium"--Abstract, page …
Instrumentation Of A Shock Tube Facility, James Everett West
Instrumentation Of A Shock Tube Facility, James Everett West
Masters Theses
"The theory of schlieren and interferometer systems was described and related to studies of shock waves in a shock tube. An interferometer was procured and a schlieren system was modified for use with the UMR shock tube facility. The design and construction of a base for the systems and window assemblies for the shock tube comprised the major portion of the work on this project. A short series of tests were run to ascertain the compatibility of the instrumentation to the UMR shock tube facility. While no schlieren photograph of the shock wave was obtained, the system was shown to …
An Intensity Regulation System For A Monochromator, David A. Wayne
An Intensity Regulation System For A Monochromator, David A. Wayne
Masters Theses
"In the investigation of phenomena involving both optical intensity and wavelength, an instrument is often desired which allows one of the quantities to be held constant while the other is varied. A relatively inexpensive system is described which utilizes a commercial grating monochromator and external feedback electronics to regulate the output intensity as the wavelength is varied. In this system, a sample of the output intensity is taken by a photosensor with known spectral response. The output of the photosensor is then compared electronically with that of a pre-programmed function generator which cancels nonlinearities in the photo-sensor. The resulting signal …
Radar Waveform Synthesis By Mean-Square Optimization Techniques, John D. Wolf
Radar Waveform Synthesis By Mean-Square Optimization Techniques, John D. Wolf
Masters Theses
"The ambiguity function is derived and its properties useful to radar waveform analysis are investigated. Synthesis of the phase-modulated waveform whose ambiguity function is the minimum mean-square estimate of some desired ambiguity function is accomplished by expanding the phase modulation function in an orthogonal series. The ambiguity function, defined as a magnitude, and the value of an arbitrary cost functional defined on the ([tau],wd) plane is then expressed in terms of the coefficients of the orthogonal series. thus, the "optimum" waveform can be determined by solving the variational equations for the coefficients. Numerical examples are presented for the …
Evaluation And Application Of Dye Tracing In A Karst Terrain, James William Scanlan
Evaluation And Application Of Dye Tracing In A Karst Terrain, James William Scanlan
Masters Theses
"The purpose of this investigation was to select and evaluate in the laboratory a tracing method appropriate for use in karstic areas, and to perform field tracing studies in the south central Missouri area bounded by the cities of Rolla, St. James, and Salem in an attempt to establish existing direct flow connections between surface and subsurface waters. Fluorescein (sodium salt), Rhodamine WT, and Rhodamine B were evaluated as tracers in the laboratory and the first two dyes were employed in the field. After careful evaluation of a number of adsorbents, extracting solvents, and detection techniques, a method consisting of …
Lattice Parameters, Coefficients Of Thermal Expansion, Densities, And Lattice Perfection Of The Copper-Indium Primary Solid Solutions, Lin Sheng Yu
Masters Theses
"Precise measurements of lattice parameters and densities of the alpha-phase Cu-In solid solutions were made at temperatures of 25°C. The thermal expansion coefficients between 15 and 65°C, the solid solubility of In in Cu at 650°C, and the soundness of crystal structure resulting from alloying were determined. The Cu-In alloys were prepared from high purity (99.999%) Cu and In by melting both metals inside evacuated quartz tubes. The solidified alloys were annealed and then examined by X-ray for homogeneity...The slowly solidified alpha-phase alloys gave densities lower than the theoretical (X-ray) values due to the presence of shrinkage microporosity. This density …
A Study Of The Anodic Oxidation Of Ethylene On Gold And Gold-Platinum Alloys, San-Cheng Lai
A Study Of The Anodic Oxidation Of Ethylene On Gold And Gold-Platinum Alloys, San-Cheng Lai
Doctoral Dissertations
"The distinctive features of electrochemical energy conversion is the direct conversion of the chemical energy of a reaction into electrical energy without going through the intermediary of heat, thereby avoiding the Carnot limitation. Since it is theoretically possible to obtain electrical energy to the extent of the free energy change of the chemical reaction, the overall thermal efficiencies expected are nearly 100 percent. However, the observed efficiencies of most electrochemical energy converters are considerably lower than this due to a slowness of one or more of the intermediate steps of the overall reaction. There has been a recent surge of …
Liquid Extraction With Single Droplets-Effect Of Chemical Reaction, William Victor Andoe
Liquid Extraction With Single Droplets-Effect Of Chemical Reaction, William Victor Andoe
Doctoral Dissertations
"The circulating drop mass transport model based on Hadamard's dispersed phase stream function was solved numerically to account for a solute diffusing into a droplet and undergoing a first order irreversible reaction with the drop medium for the case where the continuous phase resistance to solute transport is negligible ... Experimental data were obtained for a system which consisted of 2-chloro-2-methylpropane (t-butyl chloride) diffusing from a benzene continuous phase into falling water droplets and undergoing a first order irreversible reaction with the water droplets ... The experimental solute transport rates were a factor of 7 to 10 greater than those …