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Problems In Structural Diaphragm Bracing 1. Beams Continuously Braced By Diaphragms 2. I-Section Columns Braced By Girts And A Diaphragm, T. V. S. R. Apparao, S. J. Errera, Gordon P. Fisher

CCFSS Library (1939 - present)

Shear-resistant light-gage metal diaphragms can be very effective in increasing the load carrying capacity of beams continuously braced by diaphragms, or of columns braced by girts which in turn are braced by diaphragms, if proper connections are made between the individual elements. In this thesis, behavior of diaphragm-braced I-beams, channel beams, and Z-beams under uniform moments, and the behavior of axially loaded I-section columns braced by girts which in turn are braced by diaphragms are investigated.

Load-deflection relationships of diaphragm-braced beams are obtained taking into consideration the initial imperfections of the beams and using the equilibrium method. Critical moments of …

Chemical Precipitation Of Phosphorous With Sodium Aluminate And Alum In The Activated Sludge Aeration Chamber, Richard Charles Vedder

Masters Theses

"The purpose of this investigation was to study the removal of phosphorus by chemical precipitation with sodium aluminate and alum in the activated sludge aeration chamber, and determine the effect of the aluminum to phosphorus ratio and the mixed liquor suspended solids concentration on the phosphorus removal efficiency and the effect of the precipitants on the removal of organic pollutants in the activated sludge process. The studies were conducted on settled domestic sewage in three bench-scale continuous flow activated sludge units supplemented with jar tests. Major parameters employed included influent and effluent total phosphorus and chemical oxygen demand (COD), mixed …

Estimation Of Film Boiling Heat Transfer Coefficients For Cylindrical Heaters In Corresponding States Fluids, Gary Joseph Capone

Masters Theses

"An investigation of film boiling heat transfer was made with cylindrical heaters. The (0.75" O.D.) gold plated, copper heaters were positioned horizontally in pools of liquid argon, nitrogen, and carbon monoxide. A correlation for film boiling corresponding states fluids is derived and discussed. The correlation is a least squares fit of three variables: the diameter of the cylindrical heater, the reduced pressure of the system, and the temperature difference between the heater surface and the saturated pool"--Abstract, page iii.

Current Density-Anodic Potential Curves Of Single Crystal Gaas At Low Currents In Koh, Martin E. Straumanis, J. P. Krumme, William Joseph James

Materials Science and Engineering Faculty Research & Creative Works

Single p-type, GaAs crystals of high purity, Zn doped, were used to determine whether or not the inverse octahedral {111} faces show potential differences and various rates of anodic dissolution. The Ga{111}, As{111}, {110}, and {100} faces, were polished, etched, and etch-polished with concentrated H₂SO₄ + H₂O₂, and immersed in IN KOH. The Ga{111} faces were found to be the most noble with respect to rest and anodic dissolution potentials. The potential difference between the inverse {111} faces was as large as 0.14v for the rest and 0.123v for the dissolution potentials. The …

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 …

Effects Of Herbicide Combinations For Broad Spectrum Weed Control In Ornamental Plantings : Progress Report, Ronald L. Spangler

JTRP Technical Reports

No abstract provided.

Pore Studies Of Carbonate Aggregates By An Evaporation Technique : Informational Report, Harold Reid Brown

JTRP Technical Reports

No abstract provided.

The Response Of Bituminous Mixtures To Dynamic And Static Loads Using Transfer Functions, S. A. Swami

JTRP Technical Reports

No abstract provided.

Analysis Of A Focus Log Electrode In A Non Homogeneous Medium, John Julian Zenor

Doctoral Dissertations

"The mathematical model presented for the focused logging system is applicable to any resistance logging tool of the electrode type. Horizontal or cylindrical resistance interfaces may be included in any combinations. The tool and its environment are compartmentalized, and the integral form of the condition for continuity of current is applied to each compartment. Acceleration methods are applied to the iterative solution of the resulting large-scale system of linear equations. Two specific models are presented, one for the study of the effects of invasion and the other for the study of the effects of bed thickness on the apparent resistivity …

Solutions To Axisymmetric Seepage From Ponds Through Homogeneous And Nonhomogeneous Porous Media, Roland W. Jeppson

Reports

No abstract provided.

Air Pollution Control And Abatement Proceedings Of A Symposium, Allen D. Kartchner

Reports

No abstract provided.

The Damage Assessment Of Thermally Shocked High Density, High Purity Aluminum Oxide, John H. Ainsworth

Doctoral Dissertations

"The traditional approach to thermal shock testing in brittle materials has been to determine the temperature difference required to nucleate cracks in these materials. Recent work has indicated that the degree of damage after crack nucleation should be an additional consideration. The degree of damage resulting from cooling thermal shocks has been the primary consideration of the present work. Test specimens of two geometries: long, solid rods and short, solid cylinders were quenched from selected temperatures into ice water. The degree of damage was determined through strength measurements and sonic damping analysis. Initial damage occurred at a temperature difference above …

A Numerical Simulation Of Pressure Distribution And Radius Of Drainage In Infinite Radial Aquifers - Constant Rate Case, Alton John Nute

Doctoral Dissertations

"The diffusivity equation for the transient flow of slightly-compressible liquids has been solved for infinite radial aquifers, subject to constant terminal rates, by employing a Romberg integration of the Van Everdingen - Hurst explicitly solution over the transformed integral limits for .01̲TD>500, the classical solutions presented by Carslaw and Jaeger, Mortada, Theis, and others are incorporated in the digital analysis to yield dimensionless pressures for 40 selected dimensionless radius (RD) ratios between 1 and 64 for dimensionless time values of .0005 to 1000.0. A new expression for dimensionless pressure-distribution, PD'(RD, TD), as a fraction of well bore pressure drop …

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 …

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 …

An Analysis Of Dirac Delta Generated Spherical Waves In An Infinite Maxwell Medium, William F. Breig

Masters Theses

"It is an accepted fact that the simple Maxwell and Voigt models do not usually represent the behavior of real materials. In order to make the results of a model more realistic, other combinations of springs and dashpots must be considered. To understand the more complicated models, it is desirable to have a knowledge of the Maxwell model since this element usually occurs either in series or in parallel in the advanced models. This investigation reports solutions of the spherical wave equation in both the elastic and viscoelastic media. Laplace transform techniques are used to obtain the parameters; stress, velocity, …

Waveform Distortion Caused By A Plasma Sheath, James R. Carl

Masters Theses

"A short burst of electromagnetic energy that propagates into and through a plasma medium can react with the plasma medium in several different ways depending on both the characteristics of the plasma and of the pulse. This thesis derives approximations for the plasma transfer function at low pressure (high altitude) and at high pressure (low altitude). The mechanisms that can change the shape of a waveform, in general, are dispersion and breakdown. dispersive distortion at low altitude is shown to exist for electron concentrations well above the resonant concentration for plasma sheaths that are thin compared to one wavelength. Several …

Film Boiling Of Nitrogen From A Spherical Heating Surface At Atmospheric Pressure And Standard Gravity, Juan Jorge MariáNyi

Masters Theses

"A steady state film boiling heat transfer study was conducted at atmospheric pressure, with a heated sphere as the heat transfer surface and liquid nitrogen as the boiling medium. Results indicate that the heat transfer rate in film boiling is not the same around the sphere. For the same heat flux, heat transfer at the sides of the sphere takes place at higher temperatures than at the bottom of the sphere. The data were compared with the equation of Frederking and Clark for spheres (1̲8̲), which was derived to predict steady state conditions at standard, fractional and near zero gravity. …

Transportation Planning, Wilbur S. Smith

Kentucky's Annual Forum on Transportation

No abstract provided.

Management In A Changing World, James H. Healey

Kentucky's Annual Forum on Transportation

No abstract provided.

Test 964: Allis-Chalmers 180 (Diesel), 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 Study Of A Differential Equation Found In Wave Propagation And Scattering Theory, Larry W. Thacker

Electrical and Computer Engineering ETDs

The study of a differential equation that is found in the study of the scattering of waves from an inhomogeneous media and in atomic collision theory is presented. Several integral formulations for obtaining approximations to the solution are discussed and studied. Means of determining the phase shift in electron scattering problems are presented, and two methods for obtaining the reflection and transmission coefficients are developed and discussed.

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.

The Design Of A One-Man Terramechanism, Brent Charles Fryer

Theses and Dissertations

With the rebirth of special warfare in the last few years, the role of the individual soldier and of squad-sized units has been re-emphasized. Most guerilla-type fighting has been, is presently, and will most likely continue occurring in remote areas of the world. The terrain encountered may be tropical grasslands and canopy areas, or rugged mountains, inland waterways, swamps, mud flats and rice paddies. Other adverse terrain conditions are frequently encountered and must be crossed to accomplish the mission of the unit.

Development Of A Drainage Function For The Transient Case, And A Two-Dimensional Ground-Water Mound Study To Evaluate Aquifer Parameters, Seid Abdollah Jenab

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

A drainage function, D (u_n), is developed to describe the rate of fall and the shape of the water table between drains for an infinite series of parallel drains. The drainage function is evaluated and presented graphically for design purposes. The solution of the drainage function is compared with the solution of Glover's transient state drainage equation. The two equations agreed very well, but the agreement was not as good for very high values of √(4αt)/ L.

The drainage function, D (u_n ), was solved for the point midway between drains and the solution was presented graphically …

Vaporization Through Porous Membranes, Marshall E. Findley

Chemical and Biochemical Engineering Faculty Research & Creative Works

Mixtures may be evaporated from one interface of a Non wettable porous membrane with diffusion through the vapor-filled pores and condensation at the other interface of the membrane, by a sufficiently higher temperature on the mixture side maintained by a heat supply to the mixture and heat removal from the condensate equal to the latent heat transferred with vapor plus heat transferred by conduction. This permits essentially infinite-stage flash evaporation at constant liquid pressures, either with diffusion through Non condensable gases in the pores, or with vapor flow at a lower pressure than liquid pressures, but with liquids excluded from …

Economic Impacts Of The Highway Beautification Act In Kentucky, Vincent W. Mcgurl

Kentucky Transportation Center Research Report

The Highway Beautification Act of 1965, Public Law 89-285, has as one of its main purposes "the control of outdoor advertising along interstate and all Federally aided primary highways "in order to protect "the public investment in such highways, to promote the safety and recreational value of public travel and "to preserve natural beauty." The Secretary of Commerce, in cooperation with the state highway departments, was authorized to make a comprehensive study of the economic impact of such legislation on affected individuals and commercial and industrial enterprises.

Optimum Fin Spacing For Heat Transfer Per Unit Length Of Heat Exchange Section, Glenn Ellis Miller

Masters Theses

"This thesis presents the results of an experimental study of the heat-transfer ability of a finned surface as a function of the spacing between fins. The results are expressed as heat transfer per unit length of finned section rather than the heat transfer per fin. Circumferential steel fins, seven and three-quarter inches in diameter, were used for the investigation. Data was taken for fin spacings ranging from zero to one and one-half inches. The experimental heat-transfer rate to atmospheric air was determined by measuring the volume of saturated steam which condensed in the test section over a measured time interval. …

The Measurement Of Explosively Induced Stresses In Rock-Like Materials With A Capacitive Transducer, Vincent Paul Crane

Masters Theses

"A capacitive transducer was developed for measuring the free surface motion in Hydrostone blocks loaded by an explosive plane wave generator approximately one foot from the specimen. The charge to specimen distance was adjusted to produce a single spall, the position of the fracture being noted on the recovered specimen. The longitudinal wave velocity in each specimen was determined by the ultrasonic pulse technique before each shot. From the above measurements the stress, strain and strain rate at the point of fracture were determined. An attempt was made to determine the actual fracture time with imbedded [sic] conductive graphite rods, …

A Comparison Of Strength Properties Of Heat Treated Aisi 1065 Steels At High Strength Levels, Robert Lowell Hollenbeck

Masters Theses

"Six AISI C 1065 steels were heat treated and tensile tested in order to evaluate their ductility at high strength levels. Heat treating and tensile testing procedures were developed for use working with these steels at tensile strengths of 300,000 psi and higher. The austenitizing procedure in the hardening operation was found to affect the strength and ductility of the high strength samples. Rapidly heating to the austenitizing temperature followed by an immediate quench produced better properties than slow heating followed by a soaking period before the quench. However, it was concluded that the carbon contents of the steels studied …