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Compensating Techniques For Reducing The Response Of Transistor Circiuts In A Transient Radiation Environment., Goebel Davis Jr.

Electrical and Computer Engineering ETDs

The effect of transient radiation on electronic components has become a vital concern of the military. It is mandatory that certain critical ground installations, aircraft, and missile systems for the military be both reliable and effective and if possible not be rendered temporarily or permanently inoperative due to exposure to a pulse of gamma radiation.

9th Annual Meeting Rocky Mountain Spectroscopy Conference

Rocky Mountain Conference on Magnetic Resonance

Program and abstracts from the 9th annual meeting of the Rocky Mountain Spectroscopy Conference, sponsored by the Rocky Mountain Section of the Society for Applied Spectroscopy. Held in Denver, Colorado, August 7-8, 1967.

Noise In Cadmium Sulfide & Cadmium Selenide Photoconductive Cells, Edward Foster

Masters Theses & Specialist Projects

The primary object of this investigation is to design a system, including equipment and procedures, that can be used to evaluate the noise characteristics of photoconductive cells. The data once collected must be in a comprehensive and useful form. The secondary object is to use this system to evaluate a large number of cells of various types and to compare their noise profiles in a manner such that definite conclusions can be drawn concerning the absolute noise levels and profiles generated by the various cell types and the relations that may exist between the cells' noise output and the way …

Existence Of Two Types Of Drag Reduction In Pipe Flow Of Dilute Polymer Solutions, Harry C. Hershey, Jacques L. Zakin

Chemical and Biochemical Engineering Faculty Research & Creative Works

Drag reduction in the pipe flow of polymer solutions is shown to be of two types which apparently occur by two separate mechanisms. In turbulent flow, drag reduction is probably caused by viscoelastic effects. The critical solvent Reynolds number at the onset of drag reduction is proportional to about the first power of the diameter. Thus, the critical velocity is independent of tube diameter. Polymers dissolved in good solvents show more drag reduction than in poor solvents. The other type of drag reduction occurs when the laminar region is extended to high Reynolds numbers. It is followed by a transition …

Numerical Differentiation Of Equally Spaced And Not Equally Spaced Experimental Data, Harry C. Hershey, Jacques L. Zakin, Robert Simha

Chemical and Biochemical Engineering Faculty Research & Creative Works

Procedures are given for smoothing and differentiating experimental data with both equal and nonequal spacing in the independent variable. Selection of the number of points to be included in the "movable strip" technique and of the degree of the polynomial is discussed. Equations are given to estimate the error by calculating a confidence interval on each slope. A technique for handling certain types of nonrandom errors is presented. © 1967, American Chemical Society. All rights reserved.

Establishment And Maintenance Of Roadside Plantings And Turf, K. C. Arnold, J. T. Griffin

Kentucky Transportation Center Research Report

The suitability and choice of different plant materials for roadside planting will be governed primarily by cost of establishment and maintenance, by the effectiveness in stabilizing the soil, and by safety and beauty achieved. It must be recognized that conditions often encountered in roadside planting situations are different from normal conditions found in fields and yards. Soils often consist of unclassified material and are not agricultural soils in the usual sense. The material usually contains very little if any humus and little plant food and often is highly susceptible to erosion. Under these extreme conditions the establishment and maintenance of …

The Development And Use Of A Double Beam Photoelectric Polarimeter For The Study Of The Faraday Effect, John Norman Rowe

Masters Theses

No abstract provided.

A Study Of Frictional Drag Force Reduction On A Flat Plate By The Injection Of A Dilute Solution Of Guar Gum Into The Boundary Layer, Neil Henry Clay

Theses and Dissertations

The study of frictional drag force reduction has been the subject of much research for many years. One of the significant developments in the field of frictional drag force reduction has been the discovery of the effectiveness of dilute polymer solutions in reducing drag. By using dilute high-polymer solutions frictional drag forces in pipe flow have been reduced by as much as 70 per cent.

A Study Of Thermal Responses Of A Body Of Complex Geometry To A Moving Heat Source, J. Norman Smith

Theses and Dissertations

The effect of the fusion welding process upon the metals being welded is a matter of great interest and has been the subject of much investigation, both theoretical and experimental. The properties of metals are determined by the structure of their crystals (within limits for any given metal), and the crystalline structure is determined by heating and cooling rates. Thus the knowledge of temperatures, and heating and cooling rates, becomes the key to understanding these effects of heating. Since the greatest part of fusion welding is done using a gas torch or an electric arc, the necessary theoretical study is …

Model Study And Analysis Of The Flow Elements Of A Recirculation Mixing System, Albert Warren Berg

Theses and Dissertations

The term water clarifier as used in this text refers to a versatile water treatment unit which combines flocculation and coagulation, clarification and positive sludge removal in a single tank. Water clarifiers are very compact units which are being used in municipal and industrial water treatment for the removal of turbidity, algae, color, iron and silica; lime or lime-soda softening; magnesium precipitation; brine clarification; and waste water clarification with or without chemicals. Water clarifier units have found wide use in the sanitary field, providing high removals in the pre-treatment of sewage and in secondary sewage treatment through addition of coagulants.

Strength And Behavior Of Light-Gage Steel Shear Diaphragms, Larry D. Luttrell

American Iron and Steel Institute (AISI) Specifications, Standards, Manuals and Research Reports (1946 - present)

Light-gage steel roof, wall, and floor systems may be used to transfer in-plane shear forces from one part of a framed structure to another, leading to reduced loads in parts of the structure. Such behavior is particularly noticeable in buildings that have rigid shear walls and are subjected to lateral loads such as those arising from wind or earthquakes. The transfer of shear force through such diaphragms is dependent on the shear strength and is particularly sensitive to shear stiffness. The stiffness of the diaphragm must be considered in relationship to the stiffness of the structural frame. Diaphragm response to …

Water Resources Of Tacoma, Washington, Richard Martin Glaser

Graduate Student Research Papers

This study explores the fresh water and hydroelectricity resources of the City of Tacoma, Washington. The history and development of the water supply and hydroelectric facilities is examined. One can see that the development of the water resources has been directly affected by the growth in population and industry and that the nearness to the city of development sites has been an aid in this development. With the amount of water available at present and the increase in hydro-electric facilities during this decade, the future outlook for Tacoma in the field of water resources seems bright.

Relationships Between Some Properties Of Pure Homologous Organic Liquids, Herbert Rudolph Kemme

Dissertations

The vapor pressures of eleven primary straight chain alkyl chlorides and eleven primary straight chain alcohols between C3 and C16 were determined within a range of 5 to 760 mm Hg. These data were obtained by determining the boiling points of the pure materials at various pressures by using differential thermal analysis. The boiling points were determined with a precision of -.1 degree Centigrade at a 95 per cent C.I. The Antoine equation was used to analytically describe the data. The constants for this equation were determined by a multiple linear regression technique for each individual compound. The heats of …

Kinetics Of Hydrogen Reduction By Manganese Dioxide, Herbert Eugen Barner

Dissertations

Samples of synthetic pyrolusite were reduced in hydrogen at various partial pressures in the temperature range of 200° to 500°C. Most reduction experiments were conducted using a Pyrex vertical-tube reactor, in which small beds of porous particles (0.07 to 0.21 mm.) or single porous pellets of the oxide were suspended. The reaction kinetics were followed by recovering and weighing the water product formed during measured time intervals, and the intermediate reduction products were identified by X-ray diffraction analysis.

The data show that reduction proceeds through the sequence MnO₂->Mn₂O₃->OMn₃O₄- …

Heat And Mass Transfer In The Absence Of Air, James Joseph Howley

Theses

The effects of heat and mass transfer across a frosted heat exchanger operating in the absence of air was evaluated. It is felt that this work could be applied to processes such as desalination of water or the purification of materials by reverse sublimation.

The system consisted of a single 1/2” O.D. stainless steel tube mounted within a 3" O.D. plexiglas tube with the ends suitably flanged. A vacuum was maintained in the annular space. Refrigerated ethylene glycol passed through the inner tube in laminar flow. A series of runs with substantially air-free water vapor added to the annular space …

Open-Loop Frequency Response Analysis Of A Jacketed Kettle With Internal Heating/Cooling Coil, Wayne P. Brenckle

Theses

This work was performed to investigate the response and stability of a jacketed kettle with internal heating/cooling coils and glasteel thermowell. This system was first analyzed mathematically by deriving transfer functions for each component and then combining all component equations together to give the overall system transfer function. The mathematical model was then checked by frequency response analysis of the system. Bode plots of the system were prepared and the effect of the thermowell was analyzed.

Nyquist plots of the system were used as the criteria for determining stability, and obtaining the open-loop gain necessary to give optimum closed-loop response. …

The Reaction Of Cyclic Acetals With N-Halo Compounds, Nicholas Hrinkevich

Theses

Chemical reactions were carried out to determine the products of the halogenation of cyclic acetals with N-halo compounds (specifically N-bromosuccinimide and N-chlorosuccinimide) under conditions essentially free of those directly associated with free radical mechanisms (photocatalysis, peroxides, azonitriles, etc.).

Cyclic acetals were prepared and halogenated with bromine (Br2) or N-bromosuccinimide (NBS) or N-chlorosuccinimide (NCS). The distilled product from each reaction after workup was analyzed by vapor phase chromatography (VPC). The major components from the VPC were collected and identified by either infrared (IR) or nuclear magnetic resonance (NMR) spectroscopy and elementary analysis.

A mixture of compounds was found in each distilled …

Natural Gas Liquefaction, Travis George Hutchinson

Theses

In this thesis the author has developed a new process by which natural gas is converted into its liquid form. This has been accomplished by cryogenically cooling, condensing and fractionating natural gas. Resultant from this process is the design of natural gas liquefaction with valuable by-product recovery.

A Computer Program For Multicomponent Distillation From Start Up To Steady State, Leo Julian

Theses

A computer program is presented which develops for a multicomponent distillation column a composition and temperature profile as a function of time from initial start-up to steady-state conditions.

The program is written in Kingston Fortran II language for use on an IBM 1620 II machine. It is a Thiele-Geddes type solution, i.e. the total number of plates, feed plate, overhead and bottoms split are specified and the solution gives plate. compositions and temperatures. The material balance at any time is based on the composition at the previous time, increased (or decreased) by the net quantity added and removed as a …

An Investigation Of Some Properties Of Liquids Near Their Freezing Points, Martin Irwin Pulver

Theses

Five normal alcohols were prepared to greater than 99% purity. Simultaneous viscosity and density measurements were made beginning at 20°C above the reported normal freezing point and ending at incipient crystallization.

It was assumed that viscosity could be expressed as a function of specific volume and absolute volume, and that a simple logarithmic function would give a suitable correlation. The resulting equation yielded viscosities with an average error of less than 0.8% for the entire collection of data.

Deviations from a previously established linear function were observed in the density data from about 5°C above the reported normal freezing point …

Thermal Conductivity Of Mixtures, Paul Joseph Orosz

Theses

A concentric cylinder type cell was designed and constructed tp measure thermal conductivity of liquids. The materials of construction were stainless steel and teflon, so that a wide variety of liquids could be tested.

The systems studied were aqueous solutions of methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, and tertiary-butyl alcohol. Thermal conductivity was studied as a function of composition.

The data obtained were fitted to quadratic equations by least squares analysis. For each system, an equation of the following type was obtained:

k_L = A + Bx_A + Cx_A²

where k_L is thermal …

Approximation Of Reaction Rate Models, Hsu-Tung Lee

Theses

In reaction rate studies, experimental data is interpreted and correlated in terms of various mathematical models. The converse of the modeling of practical problems is the task- of experimental determination of reaction mechanisms. Generally, this approach is classified into integral and differential methods. Both involve trial and error techniques. The mathematical model which satisfies the test becomes the equation for mechanistic representation.

Both the integral and differential methods have been tried. Generally speaking, the differential method is more advantageous than the integral. For one thing, the parameters which are involved in the nodal can be determined directly by the differential …

The Measurement Of Dispersion Coefficients, John Harold Rosenberger

Theses

This work describes a method of determining axial dispersion coefficients in a packed bed chemical reactor. This is done by measurement of the fractional conversion of acetic anhydride to acetic acid, by first order reaction in dilute solution. The reaction is carried out at various flow rates in a four inch diameter reactor packed with one-half inch Raschig rings. analysis is by the aniline-rater method. Calculation of the dispersion coefficients is by trial using a digital computer. The results are presented graphically and compared to results obtained by other methods. The results of this study are found to correspond to …

Test 963: Massey-Ferguson Mf 1100 (Gasoline), Nebraska Tractor Test Lab

Nebraska Tractor Tests

EXPLANATION OF TEST REPORT GENERAL CONDITIONS East tractor is a production model equipped for common usage. Power consuming accessories can be disconnected only when it is convenient for the operator to do so in practice. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures muse conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crank case is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The …

A Model Of Strategy For Competitive Bidding In The Construction Industry., Thomas L. Morin

Civil Engineering ETDs

Competitive bidding is an intriguing, unique, and sometimes critical activity of management. In the construction industry competitive bidding is particularly important since the vast majority of private and public work is obtained by bidding against other contractors. In fact, Clough (1)* points out that competitive bidding, "the contract method of construction," accounts for an estimated 95 percent of all public construction work. Basically, the bidding process consists of several competing contractors submitting closed bids to a client who selects the bid most desirable to him. The client will usually, and may be legally required to, accept the lowest bid. Obviously, …

Generalized Transport Equations For Partially And Fully Ionized Nonequilibrium Gases., Dermod Kelleher

Nuclear Engineering ETDs

Transport equations are developed for the number densities, mean velocities, temperatures, stresses and heat fluxes of the constituents of an ionized gas by taking velocity moments of the Boltzmann equation. These equations are closed out by utilizing the Grad 13-moment approximation for each distribution function. This approximation provides a representation for the distribution function of each constituent which has as its first term a Maxwellian about the constituent mean velocity, and remaining terms which describe the deviation of the distribution function from this local constituent Maxwellian and which have as their coefficients the constituent traceless stress tensor and the constituent …

Avalanche Transistors And Diodes In A Transiecnt X-Ray Environment., Harold Thomas Cates

Electrical and Computer Engineering ETDs

The performance of avalanche transistors and diodes was investigated under transient X-ray irradiation. The diode depletion and diffusion components of radiation induced photocurrent are related to known physical constants and measurable diode parameters. Additionally, the photocurrent was related to the avalanche phenomenon and incorporated in equivalent circuits. The peak value of the transient photocurrent increased up to the avalanche break­down voltage of the diode. An equivalent circuit is given for the region prior to breakdown, which indicates that this avalanche multiplied photocurrent can be inserted as a current generator across the function. After breakdown occurred and the reverse bias voltage …

Trace Element Content Of Magnetites And Hematites, Southeast Missouri Iron Metallogenic Province, Usa, Geza Kisvarsany, Paul Dean Proctor

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

Six major and numerous smaller Precambrian iron deposits of mag-matic origin occur in the volcanic rocks of the Southeast Missouri Iron Metallogenic Province in an area approximately 70 miles long and 40 miles wide. The Precambrian igneous complex is composed of mainly high silica, with some intermediate, volcanic rocks intruded by granitic rocks and some diorites and gabbros. Biotite schists occur locally. Some of the volcanic and intrusive rocks are characterized by an unusual abundance of alkali metals. Local enrichments in fluorite, calcite, and iron oxides are present. The shapes of the iron deposits range from massive tabular to irregular. …

A Study Of Chromium-Doped High Lead Containing Silicate Glasses For Possible Laser Action, Mervet Maurice Saleh

Archived Theses and Dissertations

No abstract provided.

Linear And Adaptive Delta Modulation, John Edward Abate

Dissertations

New results are presented offering insight into the performance and optimization of linear and adaptive delta modulation, together with a comparison with pulse code modulation. The results are applied to three cases of practical importance: television, speech, and broadband signals.

The results presented can be grouped into the following three categories. First, a performance characterization of linear delta modulation (DM) is given. With the aid of certain empirical observations made from computer simulations, closed form expressions are found for granular noise, overload noise, and minimum quantization noise powers. These results permit the prediction of the optimum performance obtainable from DM …