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The Electrochemical Behavior Of The Lead-Thallium System In Acidic Sulfate Solutions, Pedro Juan Aragon Jan 1970

The Electrochemical Behavior Of The Lead-Thallium System In Acidic Sulfate Solutions, Pedro Juan Aragon

Doctoral Dissertations

"Although the literature involving the corrosion of pure lead in sulfuric acid solutions is extensive, such studies still constitute an active field of investigation and debate. Much of the effort expended on this subject is due to the need of a better understanding of the reaction in lead storage batteries as well as of the mode of electrocrystallization processes. The resistance of lead to attack by sulfuric acid renders it an important coating material in this media. It is also often used in electrochemical synthesis because of its overvoltage characteristics. Unfortunately its mechanical properties are poor, and many ways have …

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The Reaction Of N-Sulfinylamines With Diazoalkanes, Harry R. Musser Jan 1970

The Reaction Of N-Sulfinylamines With Diazoalkanes, Harry R. Musser

Doctoral Dissertations

"The photochemical decomposition of diphenyldiazomethane in the presence on N-sulfinylamines leads to ketimines. By-products include tetraphenylethylene, benzophenone, thiobenzophenone, and benzophenone azine. This reaction is the first example of carbene addition to a non-carbon containing multiple bond system. Evidence indicates that the carbene adds to the N=S bond of the N-sulfinylamine to give the corresponding thiaziridine-S-oxide which spontaneously decomposes to give ketimine and SO. In the dark N-sulfinylaniline catalyzes the decomposition of diazoalkanes to carbenes. This decomposition presumably takes place through a thiatriazole-1-oxide intermediate. The carbene then reacts either with N-sulfinylaniline to form ketimine, after loss of SO, or with diazoalkane …

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Theory Of Shallow Donor Impurity Surface States, Vidal Emmanuel Godwin Jan 1970

Theory Of Shallow Donor Impurity Surface States, Vidal Emmanuel Godwin

Doctoral Dissertations

"A variational approach has been used to solve the effective-mass equation, when the impurity ion is located at a depth d from the surface of a semiconductor, where 0 < d < db and db represents the case when the impurity ion is in the bulk of the semiconductor. The ground state and the excited state having the largest electric dipole coupling to the ground state have been determined. We have plotted the energy dependence on the depth of the impurity ion from the surface of the semiconductor. The energy has also been calculated as a function of the orientation of the …

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Thermal Expansion Of Tetragonal Pbo, Charles A. Sorrell Jan 1970

Thermal Expansion Of Tetragonal Pbo, Charles A. Sorrell

Materials Science and Engineering Faculty Research & Creative Works

Thermal expansion of tetragonal PbO, investigated by high‐temperature X‐ray diffraction in vacuum, is nearly isotropic, with the coefficient in the c0 direction only slightly greater than that in the a0 direction. Volume thermal expansion is only slightly greater than in massicot. Retardation of the litharge‐massicot transformation is tentatively interpreted as the result of very low oxygen partial pressures caused by catastrophic oxidation of the stainless‐steel sample holder and resulting oxygen scavenging by lead vapor. Copyright © 1970, Wiley Blackwell. All rights reserved

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An Approximate Min-Max Solution To The Identification Problem, Richard Loyd Warren Jan 1970

An Approximate Min-Max Solution To The Identification Problem, Richard Loyd Warren

Masters Theses

"A technique based on the min-max error criterion is proposed for identifying a dynamic system in terms of a discrete-time model from the system response to a deterministic input. A linear, single-input/single-output, lumped-parameter, time-invariant (at least during the measurement interval) system is assumed. Although the resulting problem is non-linear, it is shown that linear programming techniques are applicable if a realistic approximation is made. The technique is implemented on the digital computer and evaluated by considering a number of typical discrete-time systems. The effects of additive noise are also considered"--Abstract, page ii.

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A Study Of The Effects Of Added Solid-Liquid Interfacial Area On The Stabilization Characteristics Of Simulated Wastewater Stabilization Lagoons, Gary Lee Gaines Jan 1970

A Study Of The Effects Of Added Solid-Liquid Interfacial Area On The Stabilization Characteristics Of Simulated Wastewater Stabilization Lagoons, Gary Lee Gaines

Masters Theses

"Wastewater stabilization lagoons have recently become a popular and efficient method of sewage stabilization in many parts of the country. The purpose of this investigation was to determine the effect of added solid-liquid interfacial area on the treatment capabilities of simulated wastewater stabilization lagoons. The simulated lagoons consisted of six -15 gallon aquariums which were operated in the laboratory. The solid-liquid interfacial area was increased in four of these lagoons by suspending plastic panels in the aquariums. The lagoons were operated for a period of approximately two and a half months using dehydrated milk as a simulated waste substrate. During …

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The Design, Construction And Experimental Verification Of A Split Hopkinson Bar, Woosoon Bai Jan 1970

The Design, Construction And Experimental Verification Of A Split Hopkinson Bar, Woosoon Bai

Masters Theses

"This thesis presents the design considerations for a dynamic loading device utilizing a projectile fired from a tube. Also included is a preliminary investigation of the stress-strain relation, under dynamic loading with the device, for a plaster known as Hydrostone. Design of the unit is based on the split Hopkinson pressure bar originally developed by Kolsky and on a similar unit in use at the Lawrence Radiation Laboratory, Livermore, California. The strain pulses along the pressure bars are sensed by resistance wire strain gages and displayed on an oscilloscope. The oscilloscope traces are photographed and manually digitized for insertion into …

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The Anodic Dissolution Of Tungsten, Ching-Lun Wu Jan 1970

The Anodic Dissolution Of Tungsten, Ching-Lun Wu

Masters Theses

"The anodic dissolution of tungsten was studied in H₂SO₄-K₂SO₄ solutions (pH= -2 to 2.5) andK₂SO₄-K₂CO₃-KOH solutions (pH = 11.5 to 14.5) at 25ºC. Faradaic efficiency studies in basic solutions showed that the metal was oxidized to the +6 state. In acid solutions, a thick protective film of yellow WO₃ was formed. Polarization measurements showed linear Tafel behavior (slope ~ 2.3RT/F) in the potential region slightly more positive than the rest potentials. An anodic dissolution mechanism is proposed which involves a surface film of W₂O₅ that is further oxidized to WO₃ and dissolves by hydrolyzation"--Abstract, page 1.

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Measurement Of Thermal Accommodation Coefficients Of Steel Surfaces, Wing On Ho Jan 1970

Measurement Of Thermal Accommodation Coefficients Of Steel Surfaces, Wing On Ho

Masters Theses

"The thermal accommodation coefficient plays an important role in low density thermal energy transfer measurement. The object of this investigation was to measure the thermal energy transfer between a heated test surface and a water cooled reference surface (flat black lacquer) consisting of two infinite concentric cylinders separated by dry air. Two machined and sanded steel cylinders with mean surface roughnesses of 25 microinches and 7.5 microinches were used as the test surfaces . Measurements were made in the pressure range of 1.2 x 10⁻⁶ mm Hg. to 1.8 x 10⁻⁶ mm Hg. and temperature range for test cylinders of …

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A Study Of Microstrip Transmission Line Parameters Utilizing Image Theory, Joseph Louis Van Meter Jan 1970

A Study Of Microstrip Transmission Line Parameters Utilizing Image Theory, Joseph Louis Van Meter

Masters Theses

"This paper is a theoretical investigation of the potential, electric field, capacitance, and characteristic impedance of the open strip transmission line or microstrip configuration based upon the classical Thomson Image Technique. It provides the basis for determination of the charge distribution on the strip and reports impedance values which compare favorably both with experimental values and theoretical work in the current literature"--Abstract, page ii.

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Computer-Controlled Processing Of Radar Precipitation Signals And Lightning Data, Gary Wayne Neal Jan 1970

Computer-Controlled Processing Of Radar Precipitation Signals And Lightning Data, Gary Wayne Neal

Masters Theses

"A system for the simultaneous processing of radar precipitation signals and lightning stroke location data has been designed. The system is to be used for the purpose of determining spatial and temporal correlations of lightning and thunderstorm precipitation. This system has been developed to gain further information about the cause-effect relationship between lightning stroke activity and thunderstorm precipitation. Data acquisition and processing is accomplished through the use of an AN/FPS-18 radar set, an SCC-650 digital computer system, a radar interface, and a set of lightning detectors. The radar set provides information on precipitation activity in a circle of radius fifty …

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Magnetohydrodynamic Channel Flow With Non-Uniform Inlet Velocity Profiles, Gwok-Liang Chen Jan 1970

Magnetohydrodynamic Channel Flow With Non-Uniform Inlet Velocity Profiles, Gwok-Liang Chen

Masters Theses

"An analysis is made of laminar magnetohydrodynamic (MHD) flow development in the entrance region of a parallel-plate channel. The problem is formulated in general for any velocity distribution at the channel inlet by extending the linearization method of Sparrow, Lin, and Lundgren for non-MHD duct flows. This method involves linearization of the inertia terms in the equation of motion by introducing a stretched axial coordinate. A closed form solution is obtained for the velocity distributions which are continuous across the channel and along the length all the way from the entrance to the fully developed region. An expression for the …

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Penetration In A Graded Filter, William Chuan Shen Jan 1970

Penetration In A Graded Filter, William Chuan Shen

Masters Theses

"An experimental laboratory study conducted to examine clogging within and penetration of fines into a single layer graded filter. Hydraulic gradient, filter gradation and flow direction were varied. Forty one tests gave over six hundred individual penetration depths. The magnitude of penetration in filters with considerable variation in gradation patterns correlated with an average hydraulic radius based on the volume of voids and an approximated total surface area. It has been shown than an increased thickness of poorly graded filter will stop penetration such as that caused by seepage erosion. A relationship between hydraulic radius, penetration depth and probability of …

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Design And Construction Of A Velocity Control System For A Low Turbulence, Vertical Wind Tunnel, Lawrence Vehslage Field Jan 1970

Design And Construction Of A Velocity Control System For A Low Turbulence, Vertical Wind Tunnel, Lawrence Vehslage Field

Masters Theses

"A low velocity (0 - 11m/sec), low turbulence vertical atmospheric wind tunnel has been designed and built by Inca Engineering Company of San Gabriel, California. This tunnel was assembled in the Cloud Physics Research Center at UMR. The tunnel is designed to aid in the study of phenomena associated with water drops suspended in a vertical air stream. This thesis describes the design and construction of the velocity control system for this tunnel. Constant speed, centrifugal fans are used to draw air through the tunnel. To allow these fans to operate at a constant efficiency, a valve system is used …

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Interface Thermal Conductance With Metal Screens As Interstitial Material, William Edward Stewart Jr. Jan 1970

Interface Thermal Conductance With Metal Screens As Interstitial Material, William Edward Stewart Jr.

Masters Theses

"This thesis reports the results of an experimental investigation to determine the thermal conductance at the interface of metal specimens separated by wire mesh. Sets of metal specimens of copper, 2024-T4 aluminum, and 304 stainless steel were used. The specimens were cylindrical, axially aligned, and hydraulically loaded. All tests were conducted in an air environment. Pressure applied to the specimens ranged from 50 to 500 psig. Surface roughness of the interfaces varied from 5 to 20 micro inches. The wire mesh separators were of 304 stainless steel in 20, 30, 40, and 50 mesh. Results of the experiments show that: …

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The Possible Correlation Of Carcinogenic Activity With Electronic Structure Of Benz(A)Anthracene, Patricia Joan Blair Jan 1970

The Possible Correlation Of Carcinogenic Activity With Electronic Structure Of Benz(A)Anthracene, Patricia Joan Blair

Masters Theses

"The electronic structure of benz(a)anthracene based on the sigma and pi electrons was predicted by the modified intermediate neglect of differential overlap (MINDO) molecular orbital method and compared with the pi electronic structure determined by the Pople method. The crystalline molecular structure was used for both methods. The Pople calculation was also done on the aromatic molecular structure and a combination structure which assumed the bond lengths of the crystal structure and the bond angles of the aromatic structure. Chemical properties predicted by the MINDO and POPLE electronic structures were compared; the MINDO results provided the best agreement with experimental …

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Vibration Of A Rotating Cantilever Beam With An Independently Rotating Disk On The Free End, Darrell Blaine Crimmins Jan 1970

Vibration Of A Rotating Cantilever Beam With An Independently Rotating Disk On The Free End, Darrell Blaine Crimmins

Masters Theses

"This thesis provides a vibration analysis of a rotating cantilever beam with an independently rotating thin circular disk on the free end. The exact differential equations of the system as defined by classical Bernoulli-Euler beam theory are written using the methods of the calculus of variations. The exact equations are not solved, but two different approximations are found by assuming a cubic polynomial deflection curve and applying the equation of Lagrange. The solutions are restricted to small deflections of the beam and a shaft stiffness which permits a deflection in only a single plane. Nonlinear differential equations result in the …

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Simulation Of A Gas Storage Reservoir With Leakage By A Two-Dimensional Layered Mathematical Model, Steven William Ohnimus Jan 1970

Simulation Of A Gas Storage Reservoir With Leakage By A Two-Dimensional Layered Mathematical Model, Steven William Ohnimus

Doctoral Dissertations

"A generalized mathematical model was developed for two-dimensional compressible fluid flow accounting for the effects of relative permeability capillary pressure, and gravity drainage in addition to the reservoir properties of rock heterogenity and reservoir geometry. The generalized model developed was applied to an aquifer gas storage reservoir in which vertical leakage occurred from the main reservoir to two adjacent overlaying zones. The experimental results of Thomas, et al. were utilized in applying the model to gas storage injection/withdrawal periods yielding reasonable results for the three layers"--Abstract, page ii.

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Neutron Dependence Of Neutral Base Region Recombination, J. Bereisa, C. A. Goben Jan 1970

Neutron Dependence Of Neutral Base Region Recombination, J. Bereisa, C. A. Goben

Electrical and Computer Engineering Faculty Research & Creative Works

A discrete, deterministic mathematical model has been developed for the bulk base region of graded base devices that accounts for both the effects of neutron-induced recombination and built-in electric field in the base region at low, intermediate, and moderate current/injection levels. Exact expressions are developed for the bulk base recombination current and the collector current as functions of neutron fluence. Exact expressions are derived for the base recombination term and the relative rates of neutron-induced base current increase and collector current decrease. These expressions involve exponential and hyperbolic functions and are well suited for numerical computations and theoretical analysis. Damage …

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State Assignment Selection In Asynchronous Sequential Circuits, Gary K. Maki, James H. Tracey Jan 1970

State Assignment Selection In Asynchronous Sequential Circuits, Gary K. Maki, James H. Tracey

Electrical and Computer Engineering Faculty Research & Creative Works

Methods already exist for the construction of critical race-free assignments for asynchronous sequential circuits. Some of these methods permit the construction of many assignments for the same flow table. The algorithm presented here consists of two easy to apply tests which select that critical race-free assignment most likely to produce a set of simple next-state equations. The algorithm has been programmed. Copyright © 1970 by The Institute of Electrical and Electronics Engineers, Inc.

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Baseband Agc In An Am-Fm Telemetry System, Richard S. Simpson, William H. Tranter Jan 1970

Baseband Agc In An Am-Fm Telemetry System, Richard S. Simpson, William H. Tranter

Electrical and Computer Engineering Faculty Research & Creative Works

The use of AGc loops at the input and output of the FM link in an AM-FM telemetry system allows the mean-square transmitter deviation to be maintained near maximum value, even though data may be nonstationary. However, errors result because of the inability of the receiver AGc loop to track perfectly gain variations in the transmitter loop. In this paper the general characteristics of AGc are discussed, and a theoretical analysis is performed to determine the time constant, steady-state error, and tracking error for a first-order loop. Also, tracking error for first order and second-order loops is investigated by simulation. …

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Etch Patterns On Zone-Refined Fe, M. E. Straumonis, Chang-Soo Kim Jan 1970

Etch Patterns On Zone-Refined Fe, M. E. Straumonis, Chang-Soo Kim

Electrical and Computer Engineering Faculty Research & Creative Works

Upon dissolution of zone-refined Fe in strong acids, mainly three kinds of corrosion patterns were observed in the crystallites of the sections. Regardless of the acids, the {110} plane always appeared on the three patterns in the form of smooth and even steps, ledges, or facets. The {112}, {122}, and {123} planes were also developed but to a much lesser degree. The {100} and {111} planes were not observed because grains of the respective orientation were missing on the sections. Attempts were made to explain the formation of the planes by taking into consideration the reticular density of the planes …

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Electric Field Strength Dependence Of Surface Damage In Oxide Passivated Silicon Planar Transistors, C. A. Goben Jan 1970

Electric Field Strength Dependence Of Surface Damage In Oxide Passivated Silicon Planar Transistors, C. A. Goben

Electrical and Computer Engineering Faculty Research & Creative Works

A dependence of surface degradation induced by ionizing radiation in matched oxide-passivated silicon planar epitaxial transistors on junction fringing electric field strength present during exposure is reported. The electric field strength and gamma dose dependence are investigated of the decrease in the forward current gain, hFE (as reflected by the increase in the surface recombination current component), the increase in the surface recombination velocity (as reflected by the increase in the reciprocal of the minority carrier lifetime), and the increase in junction capacitance. Empirical prediction equations have been derived, for matched devices, correlating the normalized base current increase and the …

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Radiative Heat Transfer Analysis From A Heated Airport Runway To Fog, Gordon L. Scofield, Tom J. Love Jan 1970

Radiative Heat Transfer Analysis From A Heated Airport Runway To Fog, Gordon L. Scofield, Tom J. Love

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Radiative heat transfer between a plane source and an aerosol is investigated through the Monte Carlo method. Thermal energy is transferred from a long rectangular source to monodisperse natural fog models. The analysis is only for radiative transport and does not include convection which would be coupled in a complete analysis. Direct energy transfer to the droplets of the aerosol is investigated for values of extinction coefficient of 10 km-1 and 80 km-1, absorption coefficient to extinction coefficient ratios of 0·4 and 0·5, and scattering functions of the strong forward and isotropic types. Monochromatic radiation at a wave length of …

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Carburization Of Type 316l Stainless Steel In Static Sodium, F. B. Litton, Arthur E. Morris Jan 1970

Carburization Of Type 316l Stainless Steel In Static Sodium, F. B. Litton, Arthur E. Morris

Materials Science and Engineering Faculty Research & Creative Works

The transport of carbon from an iron-87 wt.% carbon alloy through static sodium to Type 316L stainless steel was investigated at temperatures of interest to the liquid-metal fast-breeder reactor (LMFBR) program. The rate-controlling step for the experimental geometry employed was the diffusion of carbon in the source. © 1970.

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Exact Solution For A Model Of Dislocation Pipe Diffusion, J. Mimkes, Manfred Wuttig Jan 1970

Exact Solution For A Model Of Dislocation Pipe Diffusion, J. Mimkes, Manfred Wuttig

Materials Science and Engineering Faculty Research & Creative Works

The dislocations are treated as an ideal array of parallel pipes of radius and diffusivity Dp embedded in the bulk material of the diffusivity Db. The exact solution of this problem of diffusion along semi-infinite edge dislocations is presented for cubic, tetragonal, and hexagonal crystals. The solution makes it possible to evaluate the dislocation pipe radius a and the ratio of diffusivities from one experiment. It is applied to experimental data for self-diffusion in tellurium available in the literature. The results of the calculations are a dislocation pipe radius a=(1.5 0.5)x10-4 cm and an activation energy for the pipe diffusion …

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Glory Scattering In Molecular Collisions: Formal Expressions For The Total Cross Section, Louis Biolsi Jan 1970

Glory Scattering In Molecular Collisions: Formal Expressions For The Total Cross Section, Louis Biolsi

Chemistry Faculty Research & Creative Works

An Extended Distorted-Wave Treatment is Used to Obtain Formal Expressions for the Total Cross Section When Two Rigid Diatomic Molecules with Orbital and Nuclear-Spin Angular Momenta Collide. Explicit Expressions Are Obtained through Second Order, Including the Lowest-Order Inelastic Effects.

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Case Study And Analysis Of A Low Cost Housing Project In An Urban Area In India, P. Purusothaman, Jawalker K. Sridhar Rao Jan 1970

Case Study And Analysis Of A Low Cost Housing Project In An Urban Area In India, P. Purusothaman, Jawalker K. Sridhar Rao

International Symposia on Low Cost Housing Problems

An urban development project involving residential and school buildings as an extension of Madras city is described. The analysis of the project is made using the systems approach as a problem of human settlements. The methods adopted for efficient utilisation of space at optimal cost by functional planning, use of prefabricated units and use of new constructional procedures is described. The interrelationship between environmental, technical, social, cultural, psychological, economic, financial and management factors in making decisions for the project is discussed.

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Drag Reduction Correlations, Gary Kent Patterson, J. L. Zakin, J. M. Rodriguez Jan 1970

Drag Reduction Correlations, Gary Kent Patterson, J. L. Zakin, J. M. Rodriguez

Chemical and Biochemical Engineering Faculty Research & Creative Works

No abstract provided.

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Stability Of Asymmetric Hydrodynamically Developing Channel Flows, T. S. Chen, E. M. Sparrow Jan 1970

Stability Of Asymmetric Hydrodynamically Developing Channel Flows, T. S. Chen, E. M. Sparrow

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Linear stability is studied for developing channel flows induced by asymmetric velocity profiles at the inlet. Neutral stability curves and axial variations of the critical Reynolds number are presented, showing greater stability for more skewed inlet profiles.

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