Engineering Commons^™

Microprogramming For Probability Distribution Sampling, Theodore Gyle Lewis

Electrical and Computer Engineering Faculty Research & Creative Works

Microprogramming of special instructions for sampling of random variates from any probability distribution is a means of increasing sampling speed. The diversity of sampling techniques is narrowed to one general algorithm: conditional bit sampling. Conditional bit sampling uses a high-speed uniform random number generator based on feedback shift registers to sample one bit at a time. The probability of a bit being a one in the j-th position of a binary expanded variate is stored in a table of conditional probabilities. A comparison with the pseudorandom number yields a one or zero. The table of conditional probabilities is generated once …

Peak Temperature Distribution In Steel Plates During Arc-Welding, Bhanuprakash M. Patel

Theses and Dissertations

The welding of steel plays an important role as a major fabricating process in industry. In the field of welding metallurgy, much attention is given to the effects which a welding arc or flame will have on the structure and properties of the metals being joined. The engineer is interested in the intensify and extent of physical changes brought about by the unavoidable heat treatment which accompanies the execution of a weld. In order to gain some quantitative appreciation of the way in which the metallurgical effects of welding depend on welding variables, geometry, and physical properties, considerable attention has …

An Experimental Investigation Of The Relation Between The Cooling Rate And Welding Variables In Fusion Welding, Sujit Biswas

Theses and Dissertations

In the field of welding metallurgy, much attention is given to the effects which the welding arc or flame will have on the structure and properties of the metals being joined. The engineer is interested in the intensity and extent of physical changes brought about by the unavoidable "heat treatment" which accompanies the execution of a weld.

Application Of The Finite Element Method Using The Method Of Weighted Residuals To Two Dimensional Newtonian Steady Flow With Constant Fluid Properties, Mien Ray Chi

Theses and Dissertations

In this thesis we will be concerned with the two-dimensional steady laminar Newtonian fluid flow with constant fluid properties in Cartesian coordinate system. More precisely, we will consider a flow for which the interesting dependent variables, for example, velocity, vorticity, stream function, etc., are expressible as functions of two independent Cartesian coordinates.

Operational Characteristics Of Lane Drops, Don L. Cornette

Kentucky Transportation Center Research Report

Traffic behavior studies were conducted at seven lane-drop locations, representing four lane-drop classes. These studies were composed of conflict observations (consisting of both erratic movement and brakelight applications), spot-speed observations, and lane volume counts. Such a study was made before and after each different traffic control device installation in an attempt to determine which device was the most effective in minimizing conflicts at existing lane drops. A study of conflict deviations indicates that no single type of traffic control device studied was significantly effective in reducing erratic movement and brakelight rates at all seven lane-drop locations. Rather, it appears that …

The 'Can Do' Attitude, Tim Brady

Publications

Having the Can Do Attitude is essential to be efficient. If one is efficient, then one is thinking of safety, which is the goal of the U.S. Air Force Tactical Air Command.

Powder Metallurgy, Harold L. Street

Graduate Research Papers

The purpose of the study is (1) to investigate pertinent literature and industries for the purpose of learning how the powder metallurgy process is carried out; (2) to construct a set of dies to press metal powder; (3) to use this equipment to press and sinter specimens; (4) to develop a unit of study on powder metallurgy suitable for use in an introductory metal class.

A Study Of The Prevalent Categories Of Conflict As Perceived By The Architect And The School Client On School Construction Projects In Indiana, Tracy Dust

All-Inclusive List of Electronic Theses and Dissertations

In view of the complexities which are now involved in school facility construction, it is paramount that the relationship between the architect and his school client develop fully and that it be based upon a clear and mutual understanding of role expectation. The school board, as the hiring agency, is characteristically composed of laymen both in the field of education and in the field of heavy construction. They must rely upon the judgment of the architect regarding the design features of the proposed facility and must depend upon their superintendent and his staff for determining educational program requirements.

14th Annual Rocky Mountain Spectroscopy Conference

Rocky Mountain Conference on Magnetic Resonance

Program and abstracts from the 14th annual meeting of the Rocky Mountain Spectroscopy Conference, sponsored by the Rocky Mountain Section of the Society for Applied Spectroscopy. Held in Denver, Colorado, July 31 - August 1, 1972.

Reducing Uncertainty, Richard C. Heyser

Unpublished Writings

Intended for audio engineers, Richard C. Heyser meant for this paper to bring attention to the misapplication of the theoretical concept, the Uncertainty Principle. Heyser argues that this concept has been "freely applied without regard to the errors which may result due to lack of understanding of its derivation."

Design Of Near-Time-Optimal Feedback Controllers., Chon Ho Hyon

Electrical and Computer Engineering ETDs

This dissertation presents a method for designing near-time-optimal feedback controllers of time-invariant linear normal systems in which the system matrix is negative definite and the control input is a bounded scalar function.

The basic design approach is to systematically construct a sequence of multiplane (piecewise linear) suboptimal switching surfaces which converges to the optimal switching surface and to test the quality of the suboptimal switching surface constructed in each iteration until one which satisfies the relative (optimal/suboptimal) performance criterion given a priori is obtained.

Continuous Crystallization Of High Explosives, Larry E. Hatler

Chemical and Biological Engineering ETDs

Nitroguanidine (NQ) is a high explosive which is commercially available in low bulk density form (0.20 to 0.30 gms/cm³). This low bulk density limits its usefulness as an explosive. High bulk density NQ can be produced from a NQ-N, N-dime-thylformamide-Versamid 125 system when crystallized in a mixed suspension mixed product removal crystallizer. Bulk densities ranged from 0.92 to 1.05 gms/cm³ for the operating conditions used. The effect of agitator speed, growth rate, and solids concentration on nucleation rates was determined using a multiple linear regression technique. The resulting equation is: B₀ = 0.19 (RPM) ^1.54 (G) …

Entropy Reduction Of English Text Using Variable Length Grouping, Vincent Norman Ast Jr.

Dissertations and Theses

It is known that the entropy of English text can be reduced by arranging the text into groups of two or more letters each. The higher the order of the grouping the greater is the entropy reduction. Using this principle in a computer text compressing system brings about difficulties, however, because the number of entries required in the translation table increases exponentially with group size. This experiment examined the possibility of using a translation table containing only selected entries of all group sizes with the expectation of obtaining a substantial entropy reduction with a relatively small table.

An expression was …

A New Optimization Procedure For Digital Simulation, Donald Howard Schroeder

Electrical and Computer Engineering ETDs

The theory needed to define and obtain an optimized digital simulation of a given continuous system is presented in this dissertation. The frequency domain approach to simulation is used and a nonlinear function minimization algorithm, implemented on a digital computer, is incorporated to obtain the optimum simulation.

The discrete transfer function obtained from z-transform theory is used to represent the digital system. The frequency domain response of this discrete transfer function can then be expressed simply as a function of frequency, for frequencies up to one-half the sampling frequency. A frequency domain error measure, in the complex plane, is defined …

An Evolution In Education Individualization And Learning Activity Packets In Junior High Woodworking, Joseph Wysocki

Graduate Research Papers

The purposes of the study are:

(1) To show how education has evolved throughout American history; it has always taken the best of the past with it and amalgamated- it into its present; individualization has presently advantages which today's society needs to replace conventional programs.

(2) To explain the rationale for individualization.

(3) To give an explanation of the process of making learning activity packages.

(4) To provide learning packets for a course on machines in industrial education, namely lathe and band saw.

Dispersion In Laminiar Flow Of Non-Newtonian Fluids, Subhash N. Shah

Chemical and Biological Engineering ETDs

In the present investigation, Taylor's analysis of the dispersion of solutes in laminar flow of a Newtonian fluid through a circular tube was extended to the case of a non-Newtonian Eyring model fluid. A new approach was taken to solve the convective diffusion equation for the Eyring model fluid. This approach incorporates the use of the dimensionless longitudinal pressure gradient and the mean velocity to obtain the dimensionless concentration. Using an approach similar to that of Taylor, a solution of the diffusion equation was obtained for quantities such as the dimensionless concentration, mean concentration, and effective dispersion coefficient as a …

Moment-Curvature-Thrust Relationships In Hybrid Members, Douglas Wrenn Fiala

Dissertations and Theses

In order to overcome the difficulties encountered in closed form solutions, moment-curvature-thrust relationships are developed for hybrid and nonhybrid cross sections utilizing an open form method. The use of horizontal sectors permits the inclusion of residual stresses and/or nonbilinear stress-strain relationships, if desired. Theoretical and experimental data are compared. Applications to circular tubes and other cross sections are discussed. Results indicate that open form solutions are feasible for calculating moment-curvature-thrust data. Hybrid cross sections are easily treated by open form solutions.

Acuta Enews July 1972, Vol. 1, No. 7

ACUTA Newsletters

In This Issue

First Annual Conference

Placement Assistance

Michigan State Workshop

Membership

Unstable Embankment: Us 119 Harlan-Pineville Road Stations 1260 To 1265, Tommy C. Hopkins

Kentucky Transportation Center Research Report

In January I972, an in-depth investigation of an unstable embankment, Figure 1, on US 119 near Station 1262+00 was initiated. The site is approximately five miles southwest of Harlan and near Wilhoit. Figures 2 and 3 show a plan view and a typical cross-section, respectively. US 119 travels on a tangent from Station 1252+16 to 1255+54 in a northerly direction. From that point, the roadway gradually curves four degrees to the east, becoming tangent again near Station 1275+00. At about Station 1258+00, the roadway emerges from a cut, and near Station 1266+00 it reenters a small cut. Between the latter …

Skid Resistance Of Pavements [July 1972], Rolands L. Rizenbergs, James L. Burchett, Cass T. Napier

Kentucky Transportation Center Research Report

Standard pavement types and experimental surfaces on roads throughout Kentucky were evaluated in terms of skid resistance and effects of traffic, wear, and polishing. Friction-vs-speed gradients and the relationships between locked-wheel and incipient friction were determined. Class I bituminous pavements on high-speed, four-lane roads were found to be significantly more skid resistant than on two-lane highways and somewhat more skid resistant than concrete surfaces (especially those containing calcareous gravel aggregates). Sand-asphalt surfaces containing significant proportions of limestone sands showed inadequate level of friction for the traffic sustained. Several experimental sand asphalts without limestone sands exhibited greater skid resistance; Kentucky rock …

The Use Of Hardboard And Particleboard For Composition Panels In Furniture Construction, Jerry Dean De Penning

Graduate Research Papers

This study is concerned with the investigation of lamination using particleboard and hardboard as substrates for overlays. The purpose of the research includes the following:

1. To acquire information about the history and construction processes of particleboard, hardboard, and plastic laminates.

2. To investigate the procedural application of plastic laminates and vinyl overlays to particleboard and hardboard substrates.

3. To relate to the industrial arts students the industrial use of overlays laminated to a substrate.

4. To develop an instructional unit to be used in the industrial arts program.

5. To construct a school shop project in the area of …

Talar: What Is It?, Tim Brady

Publications

A discussion of the origin of TALAR (Tactical Landing and Approach Radar) and its uses. Also known as Tactical Precision Approach System.

A Numerical Technique For Solving Rigid Body Impact On An Incompressible, Viscous Medium, Cecil Thomas Chapman

Civil & Environmental Engineering Theses & Dissertations

A technique for solving rigid-body impact on a viscous, incompressible medium is presented. The numerical scheme is adapted from the Marker and Cell (MAC) method developed to solve problems involving time-dependent motion of a viscous, incompressible fluid in two-dimensional space. As the pressure end velocity fields are computed throughout the flow field, the solution gives the force and displacement time history of the rigid-body during the impact phase. In conjunction with this, through a system of marker particles, the changes in configuration of the viscous medium on impact can be studied. With a "movie frame" (incremental time) approach, computational experimentation …

Structure And Magnetic Properties Of Rare Earth Garnets, Milan R. Kokta

Dissertations

This study deals with preparation and magnetic properties of garnet compounds containing rare earth ions and scandium ions on two crystallographic sites: the dodecahedral and the octahedral. A number of compounds of the types {R_3-yr_y}[r_x Ga_2-x](Ga₃) O_12' {R₃}[Sc₂](Fe_z Ga_3-x) O_12' {R_3-y Sc_y}[Sc₂] (Fe₃) O_12' and {R_3-y r_y)[r₂ (Fe_z Ga_3-z) O_12' where R stands for large rare earth ions such as Nd³⁺ and Pr³⁺, …

Electromagnetic Wave Propagation In Nonuniform Waveguides With Perfect Conducting Walls, Irwin Share

Dissertations

The analysis of nonuniform waveguides is formulated in terms of non-orthogonal generalized coordinates by utilizing the Hertz vector potentials and the Riemann metric tensor.

When the Hertz potential is expressible as a function of the propagation coordinate times a function of the transverse coordinates, then the nonuniform waveguide may be represented by transverse equations and a set of uncoupled nonuniform transmission lines. This decomposition facilitates studying propagation along the propagation coordinate. Sufficient conditions to achieve this decomposition are investigated. It is demonstrated that these constraints may provide guidelines for selecting a useful coordinate system to describe the nonuniform waveguide. In …

An Investigation Of The Neuromuscular Command In The Control Of Respiration, Nirmal Kumar Mishra

Dissertations

The purpose of the investigation is to study the signals involved in the respiratory system and to obtain a model for the dynamics including the activity of the phrenic nerve as the input and the transpulmonary pressure, air flow and the volume as the response.

Experiments were done on anasthetized dogs under natural breathing, with steady state response to various levels of CO2 in the inspired air, and under electrophrenic stimulation. Bipolar electrodes were used at the phrenic nerve, in the cervical region, either for recording the phrenic neurogram or for supramaximal unilateral (or bilateral) stimulation using pulse frequency modulated …

Methods For Acoustic Holography And Acoustic Measurements, Wolfgang Fischer

Dissertations

In this dissertation, a novel "four-step acoustical holographic imaging system" is described and several means for its implementation are analyzed both theoretically and experimentally. This system is compared with other methods of acoustical holography, (ie. permitting to obtain a visible, 3-D image of an object insonified with supersonic waves) and some of its advantages are indicated.

The use of optical holographic techniques to convert an arbitrary acoustic image to a visible image is investigated and a new method - the "holographic sound image converter" - is introduced and analyzed. This converter consists of the "holographic interferometer" and an appropriate "coupler". …

Manpower And Productivity In The Construction Industry, John A. Purciello

Theses

The relationship between manpower and productivity is an important factor in the area of increasing construction costs. Manpower supply is affected by worker mobility, influx of minority workers, work accidents, and training and apprenticeship programs.

A survey was conducted in the state of New Jersey to determine if a manpower shortage existed. The survey was conducted by submitting questionnaires to contractors, unions, owners, and architect-engineers.

The results of the survey indicated that a manpower shortage does exist, and that the shortage has influ enced construction costs, Furthermore, as a result of the increasing costs, indications of a decline in new …

A Solid State Kinetic Study Of Potassium Permanganate In Alkali Halide Disks, Joseph Paul Cusumano

Theses

The stoichiometry and the kinetics of the reactions of KMnO₄ in KCl and KIO₄ in KCl were studied. The kinetics of the reactions were studied at three different temperatures to obtain the thermodynamic parameters. In addition, these reactions were studied in KBr and RbI matrices. The data was obtained using infrared spectrophotometer measurements.

The reactions all appeared to be first order with respect to the permanganate ion. The stoichiometric studies indicate that the Mn₄^- is converted to Mn⁺⁺ and the Mn⁺⁺ ion apparently catalyzes the reduction of KI₄. The results indicate the …

Predictions Of Catalyst Utilization With Continuous Replacement In Multistage Continuous Reactors From Batch Reactor Data, Norman M. Feinberg

Theses

This thesis presents a new equation for predicting catalyst utilization with continuous replacement in multistage continuous reactors from batch reactor data.

An equation is derived from experimental data for a. no-replacement system which predicts catalyst activity as a function of time. The assumption of constant inventory, constant replacement rate and perfect mixing permit the calculation of catalyst age distribution. By combining age distribution with a measure of catalyst productivity, as determined from activity as a function of time, an equation for catalyst utilization was derived. The case used to prepare this equation was where the activity decline curve appears as …