Engineering Commons^™

Rheological Response Of Asphalts, David L. Allen

Kentucky Transportation Center Research Report

The rheological response of asphalt cements to shearing stresses is presented. The behavioral characteristics were measured using a rotating coaxial cylinder viscometer. Little or no development of theory is presented.

The viscoelastic portion of deformation is discussed in terms of the creep function. Plastic deformation is described using the definitions of apparent and plastic viscosities. Curves showing the effects of temperature, stress level and penetration on these two major components of strain are presented and discussed. Analysis indicated that plastic deformation is the predominant component of strain and, thus, should be considered and incorporated in the design of flexible pavements.

Construction, Protection And Maintenance Of Concrete Bridge Decks, Ronald D. Hughes, James H. Havens

Kentucky Transportation Center Research Report

This report presents an historical account of deterioration in reinforced concrete bridge decks. Preventative maintenance treatments to both new and in-service decks are discussed. Repair methods are included. The major forms of deterioration are listed and causative mechanisms are discussed. Potential design and construction remedies are presented for consideration.

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 …

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.

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 …

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."

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.

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.

Preparing And Electroplating Of Nonmetallic Materials, Dale A. Terhune

Graduate Research Papers

The purposes of this study are:

1. To research the development of electroplating non-metallic objects.

2. To discover the basic ingredients of electroplating.

3. To understand the chemical reactions which must take place to cause the ionization and electron flow.

4. To take a field trip to an industry involved in the process of electroplating.

5. To gain some background in the field of electroplating which could be developed into a unit of instruction in an industrial arts program.

6. To develop some degree of skill in the production of electroplating of non-metallic objects in small quantities.

Acuta Enews June 1972, Vol. 1, No. 6

ACUTA Newsletters

In This Issue

First Annual Conference

Membership Drive

Placement Assistance

Surveys

Future Newsletter

First Annual Conference

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

Kentucky Transportation Center Research Report

The intuitive need for improved sign legibility has increased through the years as traffic volumes, speeds and roadway designs have advanced. Because of increased traffic volumes, low-beam headlight illumination at night has become more imperative. Signs are being located farther from the travelled lanes; higher speeds are requiring messages to be more legible at greater distances (for driver decision and response). Recent studies have indicated that even Engineering Grade (2200 and 3200 Series) Scotchlite or materials designated as Type I, Class A in S.P. No. 89-A, may be inadequate for some signing situations. Signs may be made larger and(or) incorporate …

Call Signs, Tim Brady

Publications

A discussion about the origin of voice call signs and aircraft call signs.

Acuta Enews May 1972, Vol. 1, No. 5

ACUTA Newsletters

In This Issue

First Annual Conference

Future Conference Sites

Newsletter

Standing Committees

Diaphragm Braced Channel And Z-Section Beams, George Winter, Nuri Celebi, Teoman Peköz

CCFSS Library (1939 - present)

PREFACE Cold-·formed channels and Z-shapes are widely used as purlins supporting roof surfaces which consist of light-gage steel panels or other material. If the panels are interconnected to form diaphragms, they brace the purlins and increase their carrying capcity sizeably. It is the purpose of this investigation to explore this bracing effect and provide tools for its utilization in~design. The author wishes to express his gratitude to Professors George Winter and Teoman Pekoz, Project Directors. Their suggestions, criticism and guidance made this work possible. The research project covered by this report was sponsored at Cornell University by the American Iron …

The Structural Behavior Of Cold-Formed Steel Members With Perforated Elements, Charles S. Davis, Wei-Wen Yu

CCFSS Library (1939 - present)

PREFACE This report was originally a dissertation presented to the Faculty of the Graduate School of the University of Missouri-Rolla in partial fulfillment of the requirements for the Degree of Doctor of Philosophy in Civil Engineering, for conferment in May 1972. The research project described within was sponsored by American Iron and Steel Institute through a Special Engineering Fellowship in the fiscal year 1970-71. The author wishes to thank Dr. Wei-Wen Yu, Associate Professor of Civil Engineering, University of Missouri-Rolla for his invaluable guidance in his joint capacity as the project director and as major advisor of my advisory committee. …

Photo And Magnetic Gated Bi-Directional Counter, Charles Burdette Kraemer

Graduate Research Papers

The purpose of this study is to investigate digital counter circuitry, digital logic, and some special applications of digital display systems. The technical data and information ascertained from the research will be used to design and develop a four-digital counter with photo and magnetic gated inputs.

Proposed Remedies: Unstable Embankment At Mile Post 188 And Channel Erosion At Mile Post 190-191; I 64, Boyd County, David R. Houchin, James H. Havens

Kentucky Transportation Center Research Report

The Department became aware of fill slippage on I 64 some 300 feet east of mile post 188 during the summer of 1967. In September of that year Mr. L. E. Richardson, Division of Maintenance, and Mr. Gordon D. Scott, Division of Research, made an inspection of the area. Mr. Scott reported cracking of shoulder, movement of the guard rail, and a failure in the berm along the toe. However, subsequent inspections showed the slip to be stabilizing by itself until late in 1970 when some additional movement was observed. In January of 1971, the most conspicuous pavement failure was …

Traffic Controls For Maintenance On High Speed Highways, William M. Seymour

Kentucky Transportation Center Research Report

Observations were first made at lane closures on interstate highways where yellow warning signs were erected routinely in conjunction with contract work. Later data provided direct comparison between new yellow and new orange signs. One sign scheme was used throughout the study. Driver obedience improved when new signs of either color were used; this finding implies that signs should always be maintained in good condition. Orange signs were slightly more effective than yellow signs in reducing traffic conflicts and merges near the traffic cones. The results of the study tend to support the adoption of orange as the standard color …

The Longest Flight, Tim Brady

Publications

Recounts the last leg of a ferry mission in a C-7 from Southeast Asia to Okinawa where the aircraft experienced serious malfunctions. Rescue accomplished just short of destination with very minor injuries to flight crew after ditching.

Photo Chemical Milling, Terry R. Smith

Graduate Research Papers

This study is concerned with the techniques used in the production of metal parts by the use of photofabrication. Included will be a research of the historical background of the industry, and the production processes used by the photofabrication industry that apply to this project. Information will include careers, education, current status of the industry, as well as methods for implementing the processes into the industrial arts curriculum.

Lowering The Transportation And On Site Labour Costs - Some Proposals, Iraj E. Majzub

International Symposia on Low Cost Housing Problems

No abstract provided.

Suspended Modular Component System, Lawrence C. Abell, Conrad P. Heins Jr.

International Symposia on Low Cost Housing Problems

No abstract provided.

The Sears Eco-System Home, Jack R. Warner, G. Day Ding

International Symposia on Low Cost Housing Problems

No abstract provided.

Housing Design Process And Ekistics -- A Systems Approach, Jawalker K. Sridhar Rho

International Symposia on Low Cost Housing Problems

No abstract provided.

Use Of Pressurized Membranes As A Low-Cost Erection Scheme For Concrete Structures, John W. Leonard

International Symposia on Low Cost Housing Problems

No abstract provided.