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Production Attachment For Wood Turning, Julian A. Olson

Graduate Research Papers

As an industrial arts instructor for the short period of three years the writer has recognized a definite shortcoming in his instruction of the woodworking lathe. Instruction related to the woodworking lathe by the conventional "hand tool" methods is most important in leading to the students' understanding of basic turning ideas. This instruction, however, falls short of providing an up-to-date picture of the woodworking lathes used by industry.

As a means of overcoming this problem, the writer undertook the study of lathes as a project for the course, "Projects in Industrial Arts". This research provided information necessary in the construction …

Temperature Protection For Fruit Trees By Air-Supported Plastic Structures, Ram T. Gadhavi

Theses and Dissertations

The greatest weather enemy in all fruit destruction is the late spring frost which moves across the country under the high pressure areas that are occasionally seen on the weather maps, and kills the fruit buds.

Particle Dynamics In The Mixing Of A Particle-Laden Stream With A Secondary Stream In A Duct, William Doyle Cranney

Theses and Dissertations

The purpose of this thesis is to review the history and discuss the present work being done in particle-gas flow, with application to air- augmentation of a particle-carrying, fuel-rich gas jet. A drawing of the model considered is shown in Figure 1, with the area of interest labeled. The thesis is intended as a thorough literature review and analysis.

Determination Of Effective Strain For The Strainhardening Of Aluminum Subjected To Completely Reversed Strain Combinations, Navin M. Patani

Theses and Dissertations

It is known that subrecrystallization plastic deformation increases the strength of a metal. The amount of strengthening that may be acquired can be approximated using a strainhardening equation and a simple given strain. The purpose of this thesis was to determine the effective strain for predicting strainhardening for annealed aluminum subjected to completely reversed strain combinations.

A Survey Of Literature On The Pyrolysis Of Wood And Other Cellulosic Solids, Kenneth P. Sasine

Theses and Dissertations

The study of the ignition of wood and other cellulosic materials has resulted in the publication of a large amount of literature. As an aid in the planning and interpretation of future research, it was felt that a survey of a representative body of literature should be made. With this as its motivation, the present work was initiated.

Triaxial Stress Effects In Weldments Associated With The Heat Affected Zone, Rohit A. Mehta

Theses and Dissertations

The welding of steel occupies an important place as a major fabricating process in industry. The welding of steel has been a subject of research for many years, and much information has been obtained about the strength of weldments.

A Feasibility Study Of The Application Of Bondgraph Modeling And Computerized Nonlinear Model Parameter Identification Techniques To The Cardiovascular System, Randall L. Taylor

Theses and Dissertations

Recent years have witnessed an increasing trend for people in the medical and engineering professions to couple their talents in a more united effort to better understand the functioning of the human body. This union of technologies has meant the introduction of new viewpoints and techniques in the field of physiological research. The engineers' basic tool, mathematical modeling, has perhaps been one of the most noticeable additions. There has been a significant amount of work done in recent years along these lines of deriving mathematical models to express the functioning of a subsystem of the body, and then, using analog, …

An Investigation Of A Computer Technique For Determining The Characteristic Parameters Of A Viscoelastic Model With Hysteresis Effects From Transient Experimental Data, Stephen Jack Clark

Theses and Dissertations

The object of this work was to develop a computer technique for determining the characteristic parameters of spring-mass system with hysteresis effects from transient experimental data. The technique was intended to be utilized to determine the parameters of models of systems where complex geometry and rate dependent properties would make a determination of the model parameters most difficult, and where the parameters typically obtained from static test would not characterize the rate dependent properties accurately.

Runoff And Sediment Studies For San Pedro Creek, Sandoval, Bernalillo, And Santa Fe Counties, New Mexico, Elvidio Olavo Vidalito Bernado Diniz

Civil Engineering ETDs

The San Pedro Creek basin has a drainage area of 195 square miles stretching from the eastern slopes of the Sandia Mountains to the Rio Grande in the northwest. The lower elevations in the basin have a typical semiarid climate, but the higher elevations are more humid. The basin is disected by dendritic patterned drainage systems; approximately twenty-two of these systems compose the basin. The area is a woodland with juniper, pinon, and grasses prevalent. The geology of the area is very complex numerous faults occur within the basin, and three major faults border it. The soils in the basin, …

The Dynamic Pressure Distribution And Rigid Body Response Of A Small Buried Dome Subjected To An Airblast-Induced Loading., Richard Cramond

Civil Engineering ETDs

A 9 inch in diameter rigid hemispherical dome was buried in the bottomless soil bins of a vertical shock tube. The interior diameter of the soil bins was 22-3/4 inches, with the interior wall being covered with a friction reducing membrane. An airblast was generated so as to strike the soil perpendicular to the soil surface. The peak reflected pressure of this airblast averaged 315 psi throughout the fourteen tests with the dome. Instrumentation measured the air pressures at the soil surface, the free-field soil stress above and below the dome, the radial on-structure stress on the dome, the rigid …

Vacuum Deposition Of Thin Films Of Ultra-High Thickness Uniformity On Conical Substrates Having Extreme Curvature, Richard Bechtel

Electrical and Computer Engineering ETDs

For many industrial and analytical applications of thin films it is very essential to have a uniform thickness of the deposit. In response to this need, various techniques have been devised that are capable of providing the required uniformity on planar and slightly-curved spherical substrates. However, when a severe curvature (such as that encountered with some conical substrates) is introduced, the deposit uniformity that is obtainable with present techniques becomes quite poor. Thus, the need exists for new technology in this respect. Theoretical consideration is given to the problem of obtaining an ultra-uniform thin film coating on conical substrates. The …

A Study Of The Reduction Of Nickel Oxide Single Crystal By Hydrogen In A High Vacuum System., Jong In Joung

Chemical and Biological Engineering ETDs

Wafers of well-characterized nickel oxide single crystal, with (110) faces, were etched in hydrochloric acid and reduced by hydrogen in a high vacuum system. Reduction took place at temperatures of 280-310°C and pressures of 1.0-1.3 torr. The reduced wafers were replicated by carbon film and the replicas were examined by an electron microscope.

A series of reduction patterns at various stages of surface change were obtained. After a period of incubation, hemispherical metallic nickel particles, about 400 A in diameter, appeared on the parent nickel oxide surface. The number of hemispheres increased but the size of the hemispheres did not …

On The Performance Of Some Sequential Multiple-Decision Procedures, Thomas S. Edrington Ii

Electrical and Computer Engineering ETDs

The performance of several sequential procedures for the following multiple-decision problem is investigated. Samples from k random processes (or populations) are available, k at a time (one from each process), to a receiver or data processor. One process contains a signal; the other k - 1 are statistically-identical noise. The receiver is to select the odd process (locate the signal), with prescribed probability of error. The optimal receiver makes the selection in minimum average time. All computation is done under the hypothesis that the processes sampled are Rayleigh; however, a method for extrapolating results to other cases is given. The …

Fabrication Of The Pewee Nozzle; Brazing Nozzles For Rockets Powered By Nuclear Reactors, William C. Turner

Chemical and Biological Engineering ETDs

This thesis describes the steps taken to develop an improved process for brazing nozzles for nuclear-powered rockets. It defines the state of the art prior to this work. It gives an evaluation of the brazing alloys available for use. It shows the methods employed to develop the use of positive fixturing. It describes the use of full-scale sectors to refine processing. This thesis also describes the use of such new processing techniques in the successful production of two nozzles. Gold-nickel-palladium brazing alloys are used. Vacuum atmosphere performs superbly. Bands are used to hold U-tubes into slots in the shell. Problems …

Electron Emitter Tips And Method, P. D. Ownby

Materials Science and Engineering Faculty Research & Creative Works

Boron is deposited on the (110) plane facet at the center of a tungsten electron emitter tip by chemical vapor deposition of boron triiodide. The emission current density is greatest in the center of the emitting area (FIG. 2).

Interior Corrosion Of Structural Steel Closed Sections, American Iron And Steel Institute

CCFSS Library (1939 - present)

A survey of light poles, water-tank stanchions, orthotropic deck bridges, marine tubular catwalks, davits and welded steel columns strongly suggests, contrary to some beliefs, that interior surfaces of closed steel sections rust but little in the atmosphere, even when not fully sealed. Only light rusting occurs because amounts of oxy'gen and water in entrapped air are limited and condensation necessary for rusting is infrequent. Computations based on the oxidation reaction taking into account inside surface, volume of entrapped air, relative humidity and air changes show that the loss of iron thickness due to such rusting is negligible. Use of closed …

Systems Reliability Using The Flow Graph, Kenneth Edward Farrier

Dissertations and Theses

The problem of calculating the reliability of a complex system of interacting elements is delineated to a linear system, no element of the system having a reliability distribution in terms of any other e1ement of the system, where only one path is taken through the system at a time. A precise definition is then developed to specify the reliability of the linear, single path at a time, system. A precise and concise generating function is found that effortlessly produces the reliability of the linear, single path at a time, system directly from the reliability flew graph of the system.

A History Of Maine Roads 1600 - 1970, State Highway Comission

Maine Collection

A History of Maine Roads 1600 - 1970.

State Highway Commission, Augusta, Maine, 1970.

Sections: Two Transportation Firsts, Early Roads, The Stagecoach Arrives, Steamboats and Railroads, Better Roads Movement, The Automobile, State Roads, First Highway Commissioner, State Highway Department, State Highway Commission, Patrol Maintenance, Bridge Law, Federal Aid, Highway Finances, World War 1, First Route Markers, Traffic Counts, Snow and Ice Control, Planning Activities, World War 2, The Maine Turnpike, Right of Way, Division Offices, Chairman Full-Time Position, Engineering Tools and Techniques, Engineering Pioneers, The Interstate Program, Roadside Beauty, Highway Safety, Operation of the Department Today.

Diffusion And Internal Friction In Sodium-Rubidium Silicate Glasses, Gary L. Mcvay

Doctoral Dissertations

"The internal friction and self diffusion coefficients of sodium and rubidium ions for (1 - X) Na₂O·X Rb₂O·3 SiO₂ glasses have been measured. The diffusion measurements employed radioactive isotopes and a thin sectioning technique and extended from 350 to 500°C. Internal friction measurements were made from -150 to 500°C and at frequencies of 0.05 to 6000 Hz. The maximum height for the mixed alkali internal friction peak occurs at the composition where the sodium and rubidium diffusion coefficients are equal. It is concluded that the mechanism responsible for the mixed alkali peak is a cooperative rearrangement of sodium-rubidium ions and …

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

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.

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 …

Column Research Council: Proceedings 1970, Column Research Council

CCFSS Library (1939 - present)

The purposes of Column Research Council are to study and discuss problems related to the stability and strength of metal compression members; to organize research in this field; to disseminate information; and to formulate design rules for consideration by specification-writing bodies. The activities of the Council in 1970 are summarized in this report. A particular feature is the Proceedings of the 1970 Annual Technical Session. As in the past, the rosters of members of the Council and the By-Laws are also included. The support and technical contributions of the members and investigators are sincerely appreciated. Those individuals and organizations that …

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.

Use Of The Turbulence Kinetic Energy Equation In Prediction Of Nonequilibrium Turbulent Boundary Layers, William Madison Byrne Jr.

Doctoral Dissertations

"A differential method is proposed for the prediction of a broad range of turbulent boundary layers of engineering and scientific interest. A digital computer program is presented which is applicable to boundary layers with positive, negative, and zero pressure gradient in the main-stream direction as well as boundary layers with suction, blowing or zero mass addition at the wall. The turbulence kinetic energy equation is solved simultaneously with the longitudinal momentum and continuity equations to provide an independent means for determining the effective viscosity which makes allowance for "history" effects in the flow. It is shown that the prediction method …

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

Chemical and Biochemical Engineering Faculty Research & Creative Works

No abstract provided.

Australian Tractor Test Report. No. 56. Zetor 5511, G H. Vasey, W. F. Baillie

Journal of the Department of Agriculture, Western Australia, Series 4

AUSTRALIAN TRACTOR TEST REPORT

The Zetor 5511 is a general purpose farm tractor. With 43 drawbar horsepower and 51 h.p. at the P.T.O. at rated engine speed it comes within Class 5 of Australian Standard Classification of Wheeled Tractors for Agricultural Purposes, A.S. Dl0-1967. It is equipped with 18.4 x 28 pneumatic tyres.

It has a five-speed gear box with a High and Low ratio change giving 10 forward and 2 reverse speeds

Electrochemical Reduction Of Chromate In The Presence Of Nickel Chloride In Molten Lithium Chloride-Potassium Chloride Eutectic, Branko N. Popov, H. A. Laitinen

Faculty Publications

Chronopotentiometry of chromate in the presence of NiCl₂ in molten LiCl-KCl eutectic reveals a diffusion controlled, three electron reduction step. In the presence of excess NiCl₂, chromate is reduced at −0.35V vs. Pt(II)/Pt reference electrode and the electroactive species responsible for the chrono-potentiometric wave is estimated to have a diffusion coefficient of 1.06 · 10⁻⁵ cm² sec⁻¹ at 450°C. The stoichiometry of the reduction product depends mainly on the temperature at which the deposit is formed. At 500°C the deposit approaches the composition LiNi₂CrO₄. X-ray powder diffraction shows the deposit …

A Case For University Credits For Industry's In-House Continuing Education Programs, Robert E. Carlile

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

The minerals industries have long recognized the tangible and intangible returns from continuing education programs for their technical scientific and administrative personnel. These programs originate from the mutual desires of the employer to upgrade the professional competence of the employee and the employee's concurrent desires to keep abreast of new developments to review the state of the art of specialized subjects and to better qualify himself to compete in an every changing technology. In-house training and continuing education programs to provide such review and education for the employee are becoming a recognized function of companies comprising this industry. These company-sponsored …

An Explicit Simulation Of Overland Flow, Glendon Taylor Stevens

Masters Theses

"Computer simulation of overland flow requires a mathematical model which converges to a true solution. This paper presents a method, based on measurable physical parameters, which insures convergence of a fixed grid explicit numerical solution. Analysis of a wide range of overland flow plane parameters has resulted in an equation of the form Δt = 0. 2 ΔX/S_o, for the time step increment. This equation provides values for Δt that will insure stability and convergence of the fixed grid explicit numerical method of solving the spatially varied unsteady flow equations. The effect of subarea shape on the rising …