Engineering Commons^™

Analysis Of Scheduling For Low Cost Part Task Trainers, William Fellows

Retrospective Theses and Dissertations

This study develops a methodology for the analysis of Part Task Trainer (PTT) refresh scheduling used in conjunction with large simulators. A human performance model is defined through the development of descriptive equations and system random variables. PTT scheduling calculations are performed by employing a computer program simulation. The computer algorithm generates a set of random vectors to represent the learning characteristics of a sample group of individual trainees. The relationships between simulator scheduling time, PTT frequency training, and model variables are demonstrated to be user interactive. This will allow the PTT refresh scheduling program to be used as an …

A Mini Apple Network For Apple Ii Plus Computers, Michael E. Harnage

Retrospective Theses and Dissertations

Computer networks have become increasingly popular over the last ten years. A simple low cost Mini Apple Network that uses Apple II plus computers and Apple's Parallel Interface Cards, is presented here. The Mini Apple Network is driven by PIC DRIVER, a software program that is able to transmit an Applesoft array variable from one computer to another. Three application programs are presented. A comparison is made of the gain in execution time when one, two, and three computers are used to solve the same problem, namely Laplace's partial differential equation. An increase in gain was obtained when the number …

The Use Of Companding In Conferencing Voice Communications Systems, Jon P. Klages

Retrospective Theses and Dissertations

Compounded codes are used for representing voice data in digital communication systems. This thesis addresses the use of the Mu-law companding algorithm in a system optimized for conferencing. A procedure for determining the degree of compression for a variable number of conferees and design equations for implementing a table-lookup scheme using read-only-memories are presented.

Geotechnical, Hydrologic, And Hydraulic Investigation Of Mill Creek Dam-Phase Ii, Tommy C. Hopkins, Ronald D. Hughes, David L. Allen

Kentucky Transportation Center Research Report

The general scope of this study, Phase II, was to assess the safety of Mill Creek Dam. Findings obtained from detailed geotechnical, hydraulic, and hydrological investigations are presented. The structural stability, as well as the hydrological and hydraulic stability, were investigated. Specifically, objectives of the study were as follows:

1. To determine the engineering characteristics of the clay core, shells, and random fill. 2. To evaluate the potential for piping. 3. To evaluate seepage conditions at the site. 4. To evaluate the structural stability of the earth and rockfill dam. 5. To evaluate erodability. 6. To assess geologic conditions at …

Water Under Pavements, James H. Havens, Gary W. Sharpe

Kentucky Transportation Center Research Report

This report summarizes the construction and performance of a Cedergren-type underdrain system. Other installations of edge drains are reported for record. Outflows have been sufficient to cause minor erosion of fill slopes. Road Rater tests disclosed no weaknesses. Remaining life was estimated.

The Use Of Computer Vision To Close The Control Loop Of A Robot Arm, Randall S. Janka

Retrospective Theses and Dissertations

Flexible automation is a partial solution to America's industrial and economic recovery and survivability. At the core of this manufacturing technology is the robot whose own flexibility is enhanced through the use of computer vision to close the control loop on the arm and also give the robot environmental intelligence. The basic subdivisions of a computer vision system are sensing, segmentation, description, recognition, and interpretation. When the vision processor analyzes a scene it can give the robot controller symbolic object information and object coordinates. The robot controller transforms such coordinates into its own reference frame through the use of homogeneous …

Three-Phase Unidirectional Surface Acoustic Wave Transducer Model And Computer Aided Design Implementation, Samuel M. Richie

Retrospective Theses and Dissertations

This thesis presents an introduction into surface acoustics wave (SAW) unidirectional transducer (UDT) technologies and identifies advantages and disadvantages of various approaches. A complete model of the three-phase unidirectional structure is presented for the purpose of design analysis. This model incorporates the effects of the electrodes and transducer pattern along with the equivalent circuit model of the transducer structure. The model, when included with the appropriate peripheral components for transducer phasing and matching, can be used to determine accurately the frequency response of a given transducer structure. Such a model is well suited for implementation on a digital computer. With …

User’S Manual For Dynamic Programming For Highway Safety Improvement Program, Jesse G. Mayes, Joseph D. Crabtree

Kentucky Transportation Center Research Report

The term, dynamic programming, was first used by Bellman to represent the mathematical theory of a multistage decision process. Dynamic programming is applied to allocate expenditures so that maximum benefits result. Three types of applications of dynamic programming are single-stage, multistage, and multistage with a time factor. Single-stage programming is used to evaluate a single project having several alternatives. Multistage programming involves selection of several projects having several alternatives. Multistage dynamic programming with a time factor is used where several projects and alternatives are considered and where various time periods are involved.

The Alabama Highway Department did considerable work on …

The Design Of A Deep Ocean Hydrophone, Michael F. Hackathorn

Retrospective Theses and Dissertations

A design for a deep ocean hydrophone is proposed here. The hydrophone's sound sensing element is comprised of a capped end, piezoelectric cylinder. This sound sensing element is encased in an acoustic coupling fluid filled elastomeric boot. A small diameter tube communicates hydrostatic pressure from the coupling fluid to the interior of the sound sensing element for hydrostatic pressure compensation. The theoretical free field voltage sensitivity, the ratio of open circuit voltage to incident acoustic pressure, is predicted from mathematical model of the sound sensing element.

Interactive Computer Aided Design And Animation Of Spatial Mechanisms, Emmet B. Peter

Retrospective Theses and Dissertations

The synthesis of planar and spatial mechanisms is often accomplished by either trial and error supplemented by computer analysis or by specific analytical techniques in the literature. In either case it is extremely helpful to be able to visualize a physical design as it emerges, and to see a graphic display of it in animated motion. This paper describes the development of a general interactive program for both analyzing and viewing a spatial 4-bar (RSSR) mechanism in animated motion. The analysis provides complete position, velocity, and acceleration information and, for the special case of the planar 4-bar, the same information …

Pressure Drop Across A Tube Support Plate Of Trefoil Geometry Used In Steam Generator, Raad H. Bashar

Retrospective Theses and Dissertations

This research is concerned with the presentation of pressure drop experimental results across a restriction of trefoil geometry (tube support plate) used in steam generators. The pressure drops were obtained for single-phase and two-phase of air, water, and their mixtures. The tests were performed at atmospheric conditions (pressure and temperature). The loss coefficients associated with these pressure drops were experimentally determined, and empirical correlations for the results were developed. The results were compared with previous studies done on other geometries with air-water mixtures, and also to a similar geometry with steam-water mixture.

Mass Transit Study, Jacksonville Community Council, Inc.

Jacksonville Community Council, Inc.

A study to determine if mass transit is a current need in Jacksonville. Includes current user needs, ridership patterns, fare structures, potential sources of financial support, transportation modes used elsewhere and existing city transportation policies. Identifies major problems and recommends development of a varied mass transit system. PALMM

H & V News

Building Services Engineering

No abstract provided.

Maximum Minimum Reflectance Of Parallel-Polarized Light At Interfaces Between Transparent And Absorbing Media, R. M.A. Azzam

Electrical Engineering Faculty Publications

The pseudo-Brewster angle Ø_pB, of minimum reflectance R_pm for the parallel (p) polarization, of an interface between a transparent and an absorbing medium is determined by Im{(∊ - u)[1 - (1 + ∊^-1)u]²} = 0, where ∊ is the complex ratio of dielectric constants of the media and u = sin²ø_pB. It is shown that, for a given value of the normal-incidence amplitude reflectance |r|, there is an associated normal-incidence phase shift, δ = δ_mm, that leads to maximum minimum parallel reflectance, …

The Relative Importance Of Competencies Needed By Industrial Energy Managers From The Larger Manufacturers In Iowa, Timothy J. Eibes

Graduate Research Papers

The importance of identifying the competencies needed by energy managers is reflected in the seriousness of the energy problem and the impact it has on the industrial setting. The newness and ambiguity of EM, coupled with the increasing importance of the concept, add to the need for identifying the necessary competencies required in managing energy.

Ideally, once these competencies are identified, they should be the focus of those educational curriculums designed to produce energy managers. Currently there are only 25 post-high school institutions in the U.S. that have energy management curriculums (The College Blue Book, 1981). Less than half of …

Entry-Level Computer Aided Design And Drafting Skills, Stephen D. Rockey

Graduate Research Papers

The purposes of the study were to:

1) determine the entry-level competencies necessary for CAD system operation, and

2) rank in order of importance the competencies identified to be necessary for entry-level CAD system operators.

The Use Of Complex Versus Normal Modes In Structural Model Improvement, Chih Lin

Mechanical & Aerospace Engineering Theses & Dissertations

In the past, normal modes approximation to complex modes was employed by most researchers or users in the process of identification or modification of structural systems. This is true, of course for simple structures with no or proportional damping. For complex structures with nonproportional damping, even level of which is small, it will be shown that applying this approximation is inadequate. Use of complex modes instead of approximated normal modes is justified.

An algorithm is presented that computes a set of normal modes from the corresponding measured complex modes. The computed normal modes are then used in the Berman's technique …

Experiments Conducted On The Electron Beam Produced By A Dense Plasma Focus, Mark Steven Pronko

Electrical & Computer Engineering Theses & Dissertations

An experimental investigation was conducted using a 34-kJ Dense Plasma Focus (DPF) in which the possible enhancement of the electron beam was addressed. Electron beams ejected from the DPF have been observed to exceed 30 kA with pulse durations of a few nanoseconds. Enhancement was considered to be either an increase in the probability that the peak beam current exceeded some lower limit, or an increase in the mean energy of the beam electrons. The investigation was divided into two parts, each addressing one of the aspects of enhancement.

In the first part of the investigation, an axial magnetic field …

Treatment Process Optimization At The Lee Hall Water Treatment Plant Newport News, Virginia, Marcy Granum Garnett

Civil & Environmental Engineering Theses & Dissertations

Various methods can be used in operating a water treatment plant. It is desirable to produce good quality water as efficiently and economically as possible. This study evaluates each phase of operation at the Newport News (Lee Hall} water treatment plant for overall efficiency.

This study begins by giving a detailed description of the Lee Hall water treatment plant. The description includes sources of water, a description of each treatment process, a plan view of the treatment plant, and a flow diagram of the treatment plant.

Based on the raw water data, flow rates, and the treatment plant characteristics, the …

Analysis And Stability Of Closed Surge Tanks, John Emory Fowler

Civil & Environmental Engineering Theses & Dissertations

The equations representing the water surface oscillations in a closed surge tank form a set of nonlinear ordinary differential equations when the system is considered as lumped. Because of the nonlinear terms present in the equations, a closed-form solution of the equations is not available. Several numerical methods ranging from single step methods to higher-order multi-step methods were used to find numerical solutions to the governing equations. As all the methods required a similar amount of CPU time, the degree of accuracy required would determine which numerical method should be used. The effect of various system parameters on the stability …

Saint-Venant's Principle In Linear Elasticity With Microstructure, R. C. Batra

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Toupin's version of the Saint-Venant principle in linear elasticity is generalized to the case of linear elasticity with microstructure. That is, it is shown that, for a straight prismatic bar made of an isotropic linear elastic material with microstructure and loaded by a self-equilibrated force system at one end only, the strain energy stored in the portion of the bar which is beyond a distance s from the loaded end decreases exponentially with the distance s. © 1983 Martinus Nijhoff Publishers.

An Inventory Of Geothermal Resources In Nebraska, William D. Gosnold, Duane A. Eversoll

United States Department of Energy: Publications

The goal of the State Coupled Resource Assessment Program is to identify and evaluate geothermal resources in the state, particularly low-temperature potential. Eight tasks were identified and documented in this report as follows:
TASK ONE: Bottom-hole Temperature Survey
TASK TWO: Heat Flow and Temperature Gradient Survey
TASK THREE: Data Translation studies
TASK FOUR: Gravity Data
TASK FIVE: Substate Regions
TASK SIX: Information Dissemination
Heat Flow and Temperature Gradient Survey
TASK SEVEN: State Geothermal Map
TASK EIGHT: Reports
The project had three major products; (1) a map "Geothermal Resources of Nebraska,” (2) a significant amount of thermal data collected and documented …

Fuel And Process Efficiency's Affect On The Selection Of Surface Heat-Treating Processes, Christopher Scott Thorman

Graduate Research Papers

Ever since the advent of the Industrial Revolution part components and tooling have required production heat-treating to maximize life. Various forms of heat-treatment are available to heat-treating technologists and engineers, all of which have their advantages. To maximize investment, managers must decide between new processes to gain efficiency and the updating of current process to improve efficiency. Cost considerations are important but not the only ones. Quality and safety are also important to remember.

Production capacity, both present and future, is also related to cost effectiveness of heat-treating process. The heat-up and cool-down aspect which is a vital characteristic to …

Acuta Enews June 1983, Vol. 12, No. 6

ACUTA Newsletters

In This Issue

INSIDE ACUTA

PARTY LINE

FROM THE BOARD

MOUTH OF THE SOUTH

BITS & PIECES

Santa Clara Magazine, Volume 25 Number 8, Spring 1983, Santa Clara University

Santa Clara Magazine

2 - FIRST FRIEND by Robert Meyers. Nevada Senator Paul Laxalt talks about his special relationship with the President of the United States.

6 - A CONVERSATION WITH BROTHER ROGER by Patrick Samway, S.J. An interview with the founder of a remarkable ecumenical community that has become a source of inspiration for Christians everywhere.

11 - JESUIT CHAPLAINS IN WORLD WAR II by Donald F. Crosby, S.J. Chronicling the involvement of 273 Sons of Loyola who marched off as chaplains in World War II.

15 - PSYCHOLOGY AT THE STOCK EXCHANGE by Jerry Kroth. Can psychology provide us with an …

The Geology Of Maine's Coastline : A Handbook For Resource Planners, Developers, And Managers, Maine State Planning Office

Maine Collection

The Geology of Maine's Coastline : A Handbook for Resource Planners, Developers, and Managers

Executive Department, Maine State Planning Office, Augusta, Maine, June 1983.

Contents: List of Figures / Introduction: The Geological Connection / Chapter 1: Using the Marine Environments Maps / Chapter 2: Perspectives of the Maine Coast / Chapter 3: The Building Blocks of Maine's Coast / Chapter 4: The Disappearing Shoreline / Where to Go for Help / Some Planning Considerations for Development in Coastal Geologic Environments / Land Use Laws of Special Interest to Individual Coastal Property Owners

Designing And Installing Commercial Solar Pool Heating Systems, Florida Solar Energy Center, Douglass E. Root

FSEC Energy Research Center®

Solar heating of swimming pools is an economically attractive utilization of Florida's abundant solar resource. The temperature requirement is lower than that of domestic or service water heating, lower than that for building heating and far lower than that for solar powered air conditioning. Florida's year-round mild and sunny climate allows swimming during much of the winter, so a properly heated pool is economically attractive.

Enrollment Of Girls In Industrial Arts Courses From 1977-82 In Iowa High Schools, Ronald A, Wunderlich

Graduate Research Papers

Girls have enrolled in high school industrial arts classes for many years. In a thesis completed in 1958 (Haynes, 1958), it was recorded that 16 percent of Iowa's high schools enrolled girls in industrial arts courses. Today, it is a rare exception to find a high school industrial arts program that does not enroll girls. From district to district and year to year the numbers vary. It is the intention of this study to determine if the enrollment of girls is decreasing, increasing, or remaining constant. This information is needed to provide a further understanding of the enrollment of girls …

H & V News

Building Services Engineering

No abstract provided.

Optimization Of A New Linear Fm Detector Using Digital Signal Processing Techniques, Edward J.A. Kratt

Dissertations

This dissertation describes and synthesizes a new member of the family of FM detectors introduced earlier by Klapper and Kratt. A salient property of these detectors is low delay with excellent sensitivity. The emphasis in the new detector is on the ease of digital implementation. In addition, the new detector is also extremely linear. In congruence with the other Klapper-Kratt detectors, it makes use of zero group delay elements, balance at RF, quasi-synchronous detection and carrier cancellation. The Performance of the detector is mathematically analyzed under the conditions of a modulated input wave, sinewave [sic] interference, and noise. The results …