Engineering Commons^™

Ole Miss Engineer 1978

Ole Miss Engineer

No abstract provided.

Ua77/1 Western Alumnus, Vol. 49, No. 6, Wku Alumni Association

WKU Administration Documents

Alumni magazine published by WKU. This issue has the following articles:

• Dero Downing Steps Down
• Douglas, Michele. Top Banana – Gary Riggs
• Egan, Sherry. WKU State Climatic Center
• Gibson, Debbie. I Kind of Believe It’s a Gift – Burt Feintuch, Folk Music
• New on the Gridiron
• Adams, Bob. Digital Voltmeter – Engineering Technology
• Schock, Jack. The Projectile Point – Archaeology
• Armstrong, Bryan. Confessions of a Journalism Intern
• Highland, Jim. Terry Climer
• Beauchamp, Donnie. Commonplace Things – Photography
• Miller, Richard. The Exceptional Student – Psychology, Biology
• Harry Snyder Speaks at Commencement
• Douglas, Michele. Students Take Advantage of Study Trips Abroad
• Western …

Irish H & V News

Building Services Engineering

No abstract provided.

Phosphorus Content And Release From Lake Sediments By Agitation, Hsien Ping Tang

Retrospective Theses and Dissertations

Man-made mixing in shallow lakes will resuspend bottom sediments and increase phosphorus concentration in the water body. The increase in phosphorus content may affect the lake productivity. During the course of this study, a better understanding of the water-sediment-phosphorus relationships of some shallow lakes in Central Florida was attempted. Column studies and batch experiments were used to investigate the effect of mechanical mixing on the release of phosphorus from bottom sediments collected from Lake Claire and Jessup. The particle size distribution and density distribution of the bottom sediments were studied and the release of phosphorus from each fraction was measured. …

Speech Synthesis Utilizing Microcomputer Control, Joseph N. Uzel

Retrospective Theses and Dissertations

This report explores the subject of speech synthesis. Information given includes a brief explanation of speech production in man, an historical view of speech synthesis, and four types of electronic synthesizers in use today. Also included is a brief presentation on phonetics, the study of speech sounds. An understanding of this subject is necessary to see how a synthesizer must produce certain sounds, and how these sounds are put together to create words. Finally a description of a limited text speech synthesizer is presented. This system allows the user to enter English text via a keyboard and have it output …

Energy In Agriculture: Dryeration Performance Evaluation, Otto J. Loewer, Thomas C. Bridges, G. M. White, Robert L. Fehr, Larry W. Turner

Agricultural Engineering Energy Series

When grain is dried using continuous flow or portable batch dryers it must be cooled before it is placed in storage. The cooling process removes the sensible heat that was used to bring the grain temperature up to the drying air temperature, and hopefully reduces the grain temperature to a point where mold growth is no longer a problem. Unfortunately, rapid cooling of grain results in increased grain damage in terms of stress cracks, and is an energy-inefficient process in that the heat stored in the grain is not used for any useful purpose.

Energy In Agriculture: Performance Evaluation For Natural Air And Low-Temperature Drying Systems, Otto J. Loewer, Thomas C. Bridges, G. M. White, Robert L. Fehr, Larry W. Turner

Agricultural Engineering Energy Series

Natural air and low-temperature drying systems are generally not recommended for Kentucky because of their slow drying rates. In such systems the grain near the top of the drying bin may remain undried for an extended period of time, possibly leading to grain spoilage and/or the production of aflatoxin.

Energy In The Home: Grain Drying Performance Evaluation, Otto J. Loewer, Thomas C. Bridges, G. M. White, Robert L. Fehr

Agricultural Engineering Energy Series

When grain is harvested in Kentucky at moisture contents exceeding 13 to 14 percent, it must be dried to insure long-term safe storage. The drier the stored grain, the longer it will retain its quality.

The Design And Analysis Of A Unique Broadband Underwater Acoustic Source, Allan Mark Young

Retrospective Theses and Dissertations

Requirements exist for a unique type of underwater acoustic source. The transducer is in the form of a linear array of discrete elements and is required to have a constants transmitting voltage response and carefully controlled directivity characteristics over a two octave bandwidth. A generalized model of a linear array of cylindrical piezoelectric ceramic acoustic radiators is developed and applied to the design of a prototype which operates over approximately one half of the required bandwidth. The prototype transducer was built and the measured results are compared with those predicted by the model. Recommendations are made for improving the performance …

An Analysis Of The Effect Of Vibration Sensitivity On Hydrophone Design, George Dickson Hugus

Retrospective Theses and Dissertations

Hydrophones used in the ocean produce spurious outputs due to vibration sensitivity which can severely degrade measurement accuracy. Sources of these vibration inputs are ocean surface waves, flow turbulence, and induced mechanical vibration. The hydrophone response to these vibrations is a noise voltage output. This can leave to a signal-to-noise problem particularly when measurements of small sound pressure levels are to be made. The objective of this thesis is to analyze the vibration response of three typical piezoelectric hydrophone sensor elements configurations and give design methods and constraints for reducing the problem of vibration sensitivity to an acceptable level. The …

Effect Of Precursor Heating On Radiating And Chemically Reacting Viscous Flow Around A Jovian Entry Body, Kuo Yen Szema

Mechanical & Aerospace Engineering Theses & Dissertations

The influence of changes in the precursor region flow properties (resulting from absorption of the radiation from the shock layer) on the entire shock layer flow phenomena around a Jovian entry body is investigated under physically realistic conditions. In the precursor region, the flow is considered to be inviscid and the variations in flow properties are determined by employing the small perturbation technique as well as the thin layer approximation. The flow in the shock layer is assumed to be steady, axisymmetric and viscous. The analysis is carried out by considering both the chemical equilibrium and nonequilibrium composition of the …

Warrants For Left-Turn Signal Phasing, Kenneth R. Agent, Robert C. Deen

Kentucky Transportation Center Research Report

Warrants for the installation of left-turn phasing were developed. A review of literature was conducted along with a survey of the policies of other states. Field data of delays and conflicts were taken before and after installation of exclusive left-turn signalization. Left-turn delay studies were conducted at intersections with varying volume conditions. Analysis of the effect on accidents of adding a left-turn phase was made. The relationship between left-turn accidents and conflicts was investigated. Other types of analyses concerning gap acceptance, capacity, and benefit-cost ratios were also performed.

It was found that exclusive left-turn phasing significantly reduced left-turn accidents and …

A Rational Thickness Design System For Asphaltic Concrete Overlays, Herbert F. Southgate, Gary W. Sharpe, Robert C. Deen

Kentucky Transportation Center Research Report

A method of designing asphaltic concrete overlays has been developed making use of (1) Kentucky's proposed design curves, (2) an estimate of future traffic and the associated fatigue (five procedures are presented according to types of information available), (3) strength of subgrade on subject project (laboratory CBR tests or results of dynamic in-place tests such as the Road Rater), and (4) present condition of the existing pavement (from dynamic in-place tests, roughness measurements, or present serviceability index). Deterioration was expressed as reduced thicknesses of new-quality materials producing the same measured dynamic deflections. The total thickness for the predicted traffic minus …

Simulation Of Travel Patterns For Small Urban Areas, Jerry G. Pigman, Robert C. Deen

Kentucky Transportation Center Research Report

The objective of this study was to develop models which would simulate internal-external trips and external-external (through) trips. Regression analysis and cross-classification of data were tested in an attempt to predict the number of internal-external trips and the percentage of through trips. Regression analysis was used in the development of a through-trip distribution model. Grouping data for analysis created some problems; however, trial-and-error evaluation enabled selection of variables which produced reasonable results. Variables found to be most significant in the development of internal-external models were population and employment. For through-trip models, variables used were population, functional classification, AADT at the …

Interaction Between Structures And Fluids, Rahim Falsafi-Haghighi

Dissertations

A finite element model for the study of solid-fluid interaction, with applications in flow-induced vibration analysis of reactor vessel and heat exchanger internals, is presented. The model is based on the discretization of the solid equation of motion and the fluid continuity and momentum equations and employs the solid displacements together with the fluid pressure and velocity components as the nodal degrees of freedom. This permits a realistic and accurate implementation of boundary conditions, in contrast with methods using solid displacements and fluid pressure as the only field variables. The numerical solution of the resulting matrix equation, involving non-symetric matrices, …

The Measurement Of Depolarized Radiation For Monitoring The Mass Concentration Of Particulates, Bruce E. Wilson

Theses

The depolarization of backscattered polarized incident radiation which is expressed as a depolarization ratio was investigated as a means of monitoring the mass concentration of particles in stacks from coal-fired burners. This involved the design of an instrument that would detect small levels of radiation. Two methods were investigated. The first utilized a Gallium Arsenide laser and a silicon detector diode; the second was composed of a xenon flash lamp and a photomultiplier detector tube.

The relationship between the depolarization ratio and the mass concentration of diamond particles in the 0.01 gm/m³ to 0.5 gm/m³ was determined. Diamond …

Relativistic Electronic Structure Of Pbs And Pbse Molecules, Cary Y. Yang, Sohrab Rabii

Electrical and Computer Engineering

The electronic orbitals of PbS and PbSe are calculated using a scattered‐wave technique for the solution of the one‐electron Dirac equation for a polyatomic muffin‐tin potential. The resulting orbital transition energies are in good agreement with experimental absorption and emission data.

Digital Demodulator-Correlator, James C. Fletcher, James W. Layland, Warren L. Martin, Arthur I. Zygielbaum, Richard M. Goldstein, William P. Hubbard

School of Natural Resources: Faculty Publications

Apparatus for demodulation and correlation of a code modulated 10 MHz signal is comprised of a sample and hold analog-to-digital (A/D) converter synchronized by a frequency coherent 40 MHz pulse to obtain four evenly spaced samples A1,B1A2 and B2 of each cycle of the signal, and means for adding, or subtracting, each sample to, or from, one of four accumulators to form the sums:

SI, = (A1-A2) M1

Sia=; (A1-A2) M2

S2, = (B1 - B2) M1

S2= (B1-B2) M2

where

M1 = 10 MHz Reference . Receiver Code A0' M2 = 10 MHz. Reference . Receiver Code A90'

M2 …

Acuta Enews September 1978, Vol. 7, No.9

ACUTA Newsletters

In This Issue

PRESIDENT'S MESSAGE

PARTY LINE

BITS & PIECES

VIRGINIA VIEW

POTPOURRI

MOUTH OF THE SOUTH

Energy Fact Sheet: Air-Type Solar Collectors For Agricultural And Residential Use, Blaine F. Parker

Agricultural Engineering Energy Series

This publication provides information on three basic air-type solar collectors for the purpose of explaining the characteristics of each. The collectors may be purchased assembled or constructed on the site. In either case an efficient collector of the right type should be selected for a given application.

Energy In Agriculture: Energy For Swine Facilities Part Ii: Alternative Sources Of Energy, Robert L. Fehr

Agricultural Engineering Energy Series

Recently, there has been some concern about energy utilization in agricultural production. Shortages of natural and LP gas have affected many livestock producers, especially swine producers utilizing LP gas as a supplemental heat source in farrowing facilities. These shortages, coupled with an ever-increasing price for fuel and electricity, have encouraged many producers to begin looking for alternative energy sources.

Energy In Agriculture: Energy For Swine Facilities Part I: Energy Conservation, Robert L. Fehr

Agricultural Engineering Energy Series

Recently, there has been some concern about energy utilization in agricultural production. Shortages of natural and LP gas have affected many livestock producers, especially swine producers utilizing LP gas as a supplemental heat source in farrowing facilities. These shortages, coupled with an ever*increasing price for fuel and electricity, have encouraged many producers to begin looking for ways to reduce energy consumption.

Evaluation Of Paint Stripe Beads, Jerry G. Pigman, Kenneth R. Agent

Kentucky Transportation Center Research Report

This report presents another phase of a study on evaluation of paint stripes and glass beads. The results from the previous phases of this study indicated that large-scale, experimental evaluation of a 1.65 refractive-index bead and a large-gradation, 1.52 refractive-index bead was warranted. Poor embedment of beads, however, precluded the evaluation because the quick-drying paint used did not allow beads to be properly embedded. After progressive thinning of the paint with solvent, adequate bead embedment was obtained. Drying time, of course, was longer.

Attempts were made to obtain good embedment without extending the drying time. This included testing of a …

Irish H & V News

Building Services Engineering

No abstract provided.

Green-Extension Systems At High-Speed Intersections [Sept. 1978], Charles V. Zegeer, Robert C. Deen

Kentucky Transportation Center Research Report

The purpose of this study was to determine the effectiveness of green-extension systems (GES) for reducing the dilemma-zone problem associated with the amber phase of traffic signals at high-speed intersections. Reactions of 2,100 drivers were noted during the amber phase at nine intersections, and the dilemma-zone distances with respect to the stop bar were determined.

Before-and-after studies made at three green-extension sites showed a 54-percent reduction in total accidents and a 75-percent reduction in rear-end accidents after GES installation. Accident severity was unaffected.

Conflict, volume, delay, and speed data were taken before and after GES installation at two sites. A …

20th Annual Rocky Mountain Conference On Analytical Chemistry

Rocky Mountain Conference on Magnetic Resonance

Abstracts and program from the 20th annual meeting of the Rocky Mountain Conference on Analytical Chemistry, co-sponsored by the Rocky Mountain Section of the Society for Applied Spectroscopy and the Rocky Mountain Chromatography Discussion Group. Held in Denver, Colorado, August 7-9, 1978.

Acuta Enews August 1978, Vol. 7, No. 8

ACUTA Newsletters

In This Issue

VICE PRESIDENT'S MESSAGE

PRESIDENT'S MESSAGE

PARTY LINE

EXHIBIT AREA AT SNOWBIRD

VIRGINIA VIEW

MOUTH OF THE SOUTH

POTPOURRI

ATTENTION: ALL ACUTA MEMBERS!

ACUTA WELCOMES THE FOLLOWING NEW MEMBERS:

A Discussion Of Selected Aspects Of Privacy, Confidentiality, And Anonymity In Computerized Conferencing, Computerized Conferencing & Communications Center, Robert Bezilla

Computerized Conferencing and Communications Center Reports

This paper presents a discussion of the potential uses of privacy, confidentiality and anonymity in computerized conferencing.

Section I begins with definitions of the concepts, their aspects and allied terms; and briefly discusses their use in general communications and problem-solving activities.

Section II explores their use in social research, particularly the survey method, a field that may yield useful analogues for computerized conferencing.

Section III outlines the various functions of privacy, confidentiality and anonymity that have been proposed for their constructive use in computerized conferencing.

Section IV reports various difficulties and compromises that have been encountered to date in striving …

Separation Technologies Reviewed, Guna S. Selvaduray, R. N. Anderson, M. Goldstein

Faculty Publications

No abstract provided.

Energy In Agriculture: Fan Performance On Grain Drying Bins, Otto J. Loewer, Thomas C. Bridges, G. M. White, Robert L. Fehr, Larry W. Turner

Agricultural Engineering Energy Series

One of the keys to successful in·bin grain drying and aeration is the matching of a drying or aeration fan to the drying or storage bin. A properly designed system will be more efficient in terms of both drying and energy utilization. The quantity of air that may be delivered through the grain depends upon grain type, bin size, fan type, fan horsepower, depth of grain, percent of foreign material and the extent to which the grain is packed.