Engineering Commons^™

Self-Consistent Dielectric Response Of A Quasi-One-Dimensional Metal At High Frequencies, P. F. Williams, Aaron N. Bloch

P. F. (Paul Frazer) Williams Publications

We present the results of a calculation of the frequency- and wave-vector-dependent longitudinal dielectric function of a quasi-one-dimensional electron gas. The electrons are taken to be localized to the chains and both the tight-binding and free-electron extremes are considered along the chain axis. Local-field effects are included. Dispersion curves for plasmons and single-particle-excitation spectra are presented. We find that the plasmon modes are not Landau damped and that for long wavelengths these modes have eigenfrequencies ranging continuously from the usual three-dimensional plasma frequency for propagation along the chain axis to zero for propagation perpendicular to it. Finally, we discuss the …

High-Intensity Reflective Materials For Signs, Rolands L. Rizenbergs

Kentucky Transportation Center Research Report

Field observations and laboratory tests and evaluations were conducted on High-Intensity and Engineering Grade materials (Scotchlite), manufactured by the Minnesota Mining and Manufacturing Company, and were compared in regard to reflectivity, durability, and cost.

The High-Intensity Grade materials were found to have outstanding performance characteristics in comparison to Engineering Grade materials. The material significantly enhances sign legibility under low-beam illumination, and accelerated weathering tests showed superior durability.

Optimal Highway Safety Improvement Investments By Dynamic Programming [Aug. 1974], Jerry G. Pigman, Kenneth R. Agent, Jesse G. Mayes, Charles V. Zegeer

Kentucky Transportation Center Research Report

The process of determining which projects to implement under a given budget, and which to defer until later, is central to the planning and management of highway systems. With a limited budget for construction, maintenance, and safety improvements, investments which will produce the optimal benefits must be chosen. This is often impossible to accomplish without the aid of a computer because of the complexity of the problem. Dynamic programming has been tested and verified as an efficient method for selecting priority projects to derive maximum benefits.

There are several approaches to priority programming as it is related to the capital …

Optical Excitation Of Plasmons In A Quasi-One-Dimensional Conductor, P. F. Williams, M. A. Butler, D. L. Rousseau

P. F. (Paul Frazer) Williams Publications

We have carefully determined the optical spectrum of K₂Pt(CN) ₄Br_0.3 - 3H₂O near the reflectivity edge. Our data reveal, in addition to the expected monotonic background, a broad peak in ε₂ (ω) above a threshold coinciding with the zero of ε₁ (ω) near 16000 cm^-1. We assign this band to indirect excitation of plasmons. Details of the excitation of plasmons are discussed with particular attention being paid to the problems presented by the one-dimensional character of the material. It is concluded that the electronic structure of this material cannot be …

Dynamic Childbirth Simulator For Teaching Maternity Patient Care, Charles F. Knapp, George S. Eades

Biomedical Engineering Faculty Patents

A programmable patient simulator for teaching maternity patient care includes a life size manikin with a pelvis, vaginal canal, uterus, placenta, umbilical cord, and a fetal doll from which heart sounds are emitted. A programmable electro-pneumatic system controls the simulated uterine contractions, position of the uterus, rupture of membranes, expulsion of fetal doll, and fetal heart rate during labor and delivery sequence. The invention described herein was made in the course of work under a grant or award from the Department of Health, Education and Welfare.

Dynamic Childbirth Simulator For Teaching Maternity Patient Care, Charles F. Knapp, George S. Eades

Biomedical Engineering Faculty Patents

A programmable patient simulator for teaching maternity patient care includes a life size manikin with a pelvis, vaginal canal, uterus, placenta, umbilical cord, and a fetal doll from which heart sounds are emitted. A programmable electro-pneumatic system controls the simulated uterine contractions, position of the uterus, rupture of membranes, expulsion of fetal doll, and fetal heart rate during labor and delivery sequence. The invention described herein was made in the course of work under a grant or award from the Department of Health, Education and Welfare.

Dynamic Childbirth Simulator For Teaching Maternity Patient Care, Charles F. Knapp, George S. Eades

Biomedical Engineering Faculty Patents

A programmable patient simulator for teaching maternity patient care includes a life size manikin with a pelvis, vaginal canal, uterus, placenta, umbilical cord, and a fetal doll from which heart sounds are emitted. A programmable electro-pneumatic system controls the simulated uterine contractions, position of the uterus, rupture of membranes, expulsion of fetal doll, and fetal heart rate during labor and delivery sequence. The invention described herein was made in the course of work under a grant or award from the Department of Health, Education and Welfare.

The Physical Properties Of Fiberglass And Polyurethane Foam Panels In Home Construction, Karlos G. Mcclure

Graduate Research Papers

The purposes of this study are: (1). to make a general survey of the information available and (2) specifically, make a comparison of some of the physical properties of polyurethane foam and fiberglass panels and traditional methods of construction.

Design Of I-Shaped Beams And Columns With Diaphragm Bracing, S. J. Errera, T. V. S. R. Apparao

CCFSS Library (1939 - present)

Cold-formed steel panels often are used as wall sheathing, roof decking or floor decking in steel framed buildings or pre-engineered metal buildings. Diaphragms formed by interconnecting these panels have considerable in-plane shear resistance, and can be utilized as bracing against buckling for individual members of a steel frame. For wall columns the diaphragm may be either directly attached or connected to girts which in turn are connected to the columns. A procedure is presented for the design of I-section beams and columns with diaphragm or diaphragm-girt bracing. The procedure is based on the ultimate load capacity of fully braced members, …

Nutrient And Energy Composition Of Beef Cattle Feedlot Waste Fractions, C. B. Gilbertson, J. A. Nienaber, J. R. Ellis, T. M. Mccalla, T. J. Klopfenstein, S. D. Farlin

Nebraska Agricultural Experiment Station: Historical Research Bulletins

This bulletin describes nutrient and energy composition of beef cattle waste fractions as a function of the ration roughage level and type of feedlot. Results can be used to plan engineering system approaches and research to develop handling and processing equipment necessary for recovery of the most valuable portion of waste.

Water Salvage Potentials In Utah, Volume I. Open Water Evaporation And Monolayer Suppression Potential, Trevor C. Hughes, E. Arlo Richardson, James A. Franckiewicz

Reports

An estimate of the potential in Utah for evaporation suppression by the monolayer film method is presented. The model estimates evaporation suppression as a function of wind speed, a four parameter exposure factor, and reservoir size. The estimated suppression factors vary from 0 to 30 percent and average 11 percent of the statewide total annual evaporation. Estimates of May to October evaporation and suppression potential are calculated for each of the 227 impoundments in the surface water inventory. A forthcoming report in this series will examine the potential for evaporation suppression by thermal destratification. This procedure, which is already being …

"Before" Evaluation Of Economic Growth Center Developmental Highway (Ky 55, Campbellsville-Lebanon), Joseph T. Farmer, Jerry G. Pigman

Kentucky Transportation Center Research Report

Before-and-after impact studies were selected as the means of determining the effect of reconstructing a 4.813-mile (7.744-kilometer) section of KY 55 between Campbellsville and Lebanon. The area, though still depressed in terms of per capita income and employment, has many resources available for growth. The study area is predominantly an agriculturally-oriented economy. However, manufacturing employment has increased in recent years, mainly because of industrial sites made available by local industrial commissions.

Overall, social services appear to be adequate and very near statewide averages. Recreational facilities are not highly developed and are primarily of the summer outdoor type.

Reconstruction of KY …

Temperature Distributions In Asphaltic Concrete Pavements, Herbert F. Southgate

Kentucky Transportation Center Research Report

The straight-line relationship between temperatures at a given depth and the surface temperatures combined with 5-day average air temperatures appears to be as valid for upper New York State and Arizona as it was for Maryland. The main differences were in the ranges and mean temperatures. Values given herein are for straight-line equations for all 24 hours and for the depths of 2, 4, 6, 8, 10, and 12 inches (5.1, 10.2, 15.2, 20.3, 25.4, and 30.5 cm). The original concept appears to be valid and may be used with confidence for estimating pavement temperatures at other latitudes and longitudes.

Tree-Covered Land-Forms For Noise Control, David I. Cook, David F. Haverbeke

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The objective of this study was to determine means for controlling intrusive noise by combining trees and shrubs with land-forms or other solid barriers. The solid barriers would provide some immediate relief, and the plant materials would increase the protection as they matured.

Electronic Color Scanners, Kenneth Francis Hird

Graduate Research Papers

Process color photography has been continually developing for many years. In fact, color printing techniques are still benefiting, through additional sophisticated requirements, and from a discovery made about 300 years ago. At that time Sir Isaac Newton, British scientist, mathematician • and philosopher, placed a glass prism in the path of a narrow beam of sunlight entering his room through a pinhole in an opaque window shade. He determined that ordinary white light is a mixture of colored lights.

Unfortunately, in practice, ideal pigments for three-color inks do not exist and this impasse greatly complicates the job for the photo-processor. …

Gasket Or Squeegee Painting, Virgil J. Berg

Graduate Research Papers

This investigation was undertaken with the purpose of revealing and developing a method of gasket or squeegee painting which could be successfully implemented in any industrial arts laboratory. Specific objectives of the study will be to determine the answers to the following questions:

1. Of what does the process consist?

2. What industries or manufacturing concerns are using the process?

3. Is the process satisfactory for use in the industrial arts laboratory?

4. Is the process economically feasible for student use?

5. Is the process within the range of average student ability?

6. Can equipment for the process be developed …

Resonant Footing Test Apparatus, Bobby O. Hardin, Woodrow W. Thurman

Civil Engineering Faculty Patents

An apparatus for conducting resonant footing tests upon undisturbed soils includes an oscillatable mechanical structure with attachable electrical means for causing both oscillation of the structure and measurement of the behavior of the soil under test. The apparatus is transportable to the site at which the test is conducted on soil in-situ, and is adapted to be employed under selective loadings applied downwardly upon the oscillatable structure.

Identification Of Hazardous Locations On Rural Highways In Kentucky, Charles V. Zegeer

Kentucky Transportation Center Research Report

The purpose of this study was to determine the most effective method of identifying hazardous locations for on-site investigations. To decrease the possible effect of random or spurious accidents on the identification of hazardous locations, a 0.3-mile (0.48-km) segment was chosen along with 1- and 2-year periods for accumulating and comparing accident data. An optimal method for identifying hazardous locations and sections was determined to be one which (1) maximizes benefits from improvements, (2) identifies locations with critically high accident rates, and (3) identifies potential hazards. A sample of 170 locations was used to compare several location-identification methods. The procedure …

Acoustic Emission Testing Of Shielded Metal-Arc Welds Using Astm A 36 Steel, Theodore Hopwood Ii

Kentucky Transportation Center Research Report

Manual, shielded metal-arc welds on ASTM A 36 structural steel were monitored with acoustic emission equipment. The listening device detected operator inconsistencies and improper electrode deposition during the welding operation. On completion of the weld, acoustic emission monitoring detected slag inclusions, cracking, and martensite formation.

Shear Strength Of Cohesive Soils And Friction Sleeve Resistance, Vincent P. Drnevich, C. Thomas Gorman, Tommy C. Hopkins

Kentucky Transportation Center Research Report

Cone penetrations tests were performed on the silty clays of Kentucky, U.S.A., using a boring rig to push the Dutch, friction sleeve, cone penetrometer. Thin-walled tube samples were taken from nearby boreholes. For the first four sites, unconfined compression tests and unconsolidated-undrained triaxial test were performed on the samples. For the last four sites, consolidated-undrained triaxial tests were performed on the samples. A procedure for estimating in situ shear strength from triaxial test stress paths was developed.

Small rock fragments in these residual soils caused erratic cone resistance at many locations. As a result, the friction sleeve resistance provided the …

Short Range Development Plan 1974-1979, Jacksonville Area Planning Board

Arthur N. Sollee, Sr. Textual Materials

A five year Short Range Development Plan was prepared simultaneously with and as the basis for Jacksonville's Capital Outlay Program (COP). Background studies for the Plan included land use and structural surveys, population and dwelling unit projections, zoning change and site plan approval trends, land use assignment criteria, and environmental and capital improvement needs criteria. A land use plan adequate to serve projected growth was prepared. The Transportation Plan reflects the latest transportation studies for the City including proposals for a fixed guide way, express bus and local bus systems. All additional community facility and utility needs for projected 1980 …

Use Of A Micro-Computer In A Missile Simulator, James A. Rose, James V. Leonard, Herbert A. Crosby

Electrical and Computer Engineering Faculty Research & Creative Works

In 1971 McDonnell-Douglas was awarded a contract for a new missile system. The missile power, discrete command/ response, and digital systems were described with emphasis on the digital data format, error detection and timing. A missile simulator, the S/TS, was briefly described showing how the shortcomings of a previous simulator were eliminated. A listing of the S/TS design criteria was given, and the design logic based on utilization of a micro-computer was described.

Before-And-After Analysis Of Safety Improvements On I 75 In Northern Kentucky, Jerry G. Pigman

Kentucky Transportation Center Research Report

In September 1971, the U.S. House of Representatives Subcommittee on Investigations and Oversight met in Covington, Kentucky, to discuss the accident experience and remedial procedures taken to alleviate the frequency of accidents occurring on approximately five miles of I 75 just south of Cincinnati. This section of highway had been and was continuing to be the subject of several safety improvements. The objective of this study was to conduct before-and-after investigations of the effectiveness of the following safety improvement projects: (1) five variable message signs within a two-mile section, (2) a New Jersey-type median barrier wall extending approximately four miles, …

"Before" Evaluation Of Economic Growth Center Developmental Highway (Us 25e: Corbin-Barbourville), Joseph T. Farmer, Jerry G. Pigman

Kentucky Transportation Center Research Report

Before-and-after impact studies were selected as the means of determining the effect of reconstructing a 4.886 mile (7.862 kilometer) section of US 25E between Corbin and Barbourville. A comprehensive analysis of the "before" statistics revealed the area designated as a potential growth center suffered from social and economic mediocrity. Many characteristics considered essential for economic prosperity are lacking. Per capita income and educational achievement levels are lower than statewide averages. Transportation is dependent upon highways and many existing routes provide a very low level of service.

On the other hand, the area has adequate industrial and recreational potential to insure …

A Rock Evaluation Schema For Transporting Planning In Kentucky, C. D. Tockstein, M. W. Palmer

Kentucky Transportation Center Research Report

The initial goal was to devise an engineering classification system for intact rock samples based on simple index tests which could be used to categorize Kentucky surface and near-surface rock types and assist Kentucky Department of Transportation personnel in planning for transportation facilities. While conducting the literature survey, several facts become apparent:

1. a large number of rock classification systems, geologic and technical, general and specific, already existed;
2. an equally large number of index tests had been devised; and
3. there was a lack of communication among those involved in specialized areas of rock-related work (geologists, civil engineers, mining engineers, etc.), and, …

Operational Characteristics Of Lane Drops, Don L. Cornette, Robert C. Deen, James H. Havens

Kentucky Transportation Center Research Report

Traffic behavior studies were conducted at seven lane-drop locations, representing three lane-drop classes. These studies consisted of conflict observations (that is, erratic movements 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 different traffic …

Electronic Ignitions, Leo A. Green

Graduate Research Papers

It is the purpose of this study to (1) review all available literature on electronic ignitions; (2) study the function and application of electronic ignitions; (3) determine the advantages of a capacitive-discharge ignition system over a conventional system; (4) develop an instructional unit around the function and application of electronic ignitions; and (5) prepare a written and oral report on electronic ignitions.

Conference Keynote Address, John B. Rigg

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

No abstract provided.

Prospects For Conversion Of Solar Energy Into Electrical Power, William R. Cherry

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

In 1972, the Solar Energy Panel took a broad look at solar energy across the whole field to see just what could be done with this energy source. Maybe the era of acquiring energy without regard to cost and without regard to consequences of using it is beginning to come to a close and maybe we ought to start looking at the newer sources of energy, even though we need every bit of energy we can get from every source. I am not trying to say we don't need gas, oil, coal and nuclear energy. We are not going to …

The U. S. Wind Power Program, Joseph M. Savino

UMR-MEC Conference on Energy / UMR-DNR Conference on Energy

Today I would like to talk about wind energy in, basically, two parts. I would like to bring to your attention some of the developments that have occurred in the 20th century. Many of us who have gone through school in the last 25-30 years don't recall anywhere in our engineering education much information dealing with wind energy, and that may come as a surprise to you as it did to me, to learn how much has actually been done in the 20th century to develop large scale wind-driven machines. After I get through with that introduction I would like …