Engineering Commons^™

Problem Identification For Highway Safety Plan (Fy 1984), Jerry G. Pigman, Kenneth R. Agent, Tom Creasey

Kentucky Transportation Center Research Report

An annual highway safety program is proposed each year for the State of Kentucky in order to comply with Section 402, Title 23 of the United States Code. This program includes the identification, programming, budgeting, and evaluation of safety projects. This report is the fifth in a series of annual reports which have been included as the problem identification portion of Kentucky's Annual Highway Safety Plan.

In the past, the approach to problem identification has been to identify problem areas in the 18 highway safety program areas (standards). While the search for problems in each of these standard areas will …

Alcohol Impact Evaluation (Interim Report), Jerry G. Pigman, Kenneth R. Agent

Kentucky Transportation Center Research Report

This report is an evaluation of increased police enforcement to reduce alcohol related accidents in Lexington-Fayette County, Kentucky. Three types of information were collected for the analysis; accident data, arrest and adjudication data, and personal opinion data obtained by means of a questionnaire survey. Accident data were collected for two years before the Traffic Alcohol Program (TAP) and one year during the program. A 25 percent sample of arrest and adjudication data was collected one year before and one year during TAP. The questionnaire was sent to 2,500 registered vehicle owners.

Results from before-and-after comparisons and time-series analysis show alchol …

Highway Skid Resistance, James H. Havens

Kentucky Transportation Center Research Report

The physics of friction and traction are reviewed. Hypotheses are presented. Use of a scanning electron microscope to detect and identify polishing aggregate is presented.

Size reduction (crushing) produces greater concentrations of sharp edges, reducing flat and plane surfaces not otherwise contributing to traction.

Surface permeability and drainage through macrotexture was evaluated by an air-percussive device. An air-efflux device was contrived for evaluating hydroplaning potential and for evaluating open-graded surface courses. In-filling has been observed where road debris is abundant.

Grippers and sharpness are needed for wet traction . Drainage is needed to lower hydroplaning potentials. Sand-sizes optimize the concentration …

Structural Design And Installation Criteria For Rigid And Flexible Conduit, Ronald D. Hughes

Kentucky Transportation Center Research Report

Structural design criteria according to current AASHTO guidelines for pipe, pipe-arch, and arch culverts are presented. Fill-height tables, based upon fhose criteria, and proposed bedding details are included.

Low-Strength (Pozzolanic) Materials For Highway Construction, Gary W. Sharpe, Larry Epley, David L. Allen, Herbert F. Southgate, Robert C. Deen

Kentucky Transportation Center Research Report

No abstract provided.

Screening Design Test For Cobalt Cementation From Zinc Electrolyte, Mark S. Blaser, Thomas J. O'Keefe

Materials Science and Engineering Faculty Research & Creative Works

No abstract provided.

Explicit Equations For The Second Brewster Angle Of An Interface Between A Transparent And An Absorbing Medium, R. M.A. Azzam

Electrical Engineering Faculty Publications

The second Brewster angle _ΦB2, at which the ratio R_p/R_s of intensity reflectances R_p and R_s for the parallel (p) and the perpendicular (s) polarizations of a dielectric-conductor interface reaches a minimum, is determined by Im[(u - ∊)(u - ∊)²/(u - 2∊)²] = 0, where ∊ is the complex ratio of dielectric constants of the media of refraction and incidence, ∊ = ∊/(∊ + 1), and u= sin²_ΦB2. An equivalent quartic equation in u …

Testing Of Steel Roof Deck Construction, S. Sucharit, Lan-Cheng Pan

CCFSS Library (1939 - present)

No abstract provided.

Design Of Automotive Structural Components Using High Strength Sheet Steels Preliminary Study Of Members Consisting Of Flat And Curved Elements, Wei-Wen Yu, M. Brad Parks

CCFSS Library (1939 - present)

No abstract provided.

Design Of Automotive Structural Components Using High Strength Sheet Steels-Strength Of Beam Webs, Chiravut Santaputra, Wei-Wen Yu

CCFSS Library (1939 - present)

I. INTRODUCTION In February 1981, the "Guide for Preliminary Design of Sheet Steel Automotive Structural Components" was issued by American Iron and Steel Institute (AISI) for assisting automotive structural designers to achieve weight reduction through the efficient utilization of carbon and high strength steels. 1 These design recommendations were based primarily on the 1968 Edition of the AISI "Specification for the Design of Cold-Formed Steel Structural Hembers,,2 but contained the following major differences with regard to the AISI Specification, which was written 'for the design of buildings: 1,4 a. The design expressions presented in the Guide are based on an …

Crushed Rock Bases, James H. Havens, Gary W. Sharpe

Kentucky Transportation Center Research Report

Prepared in cooperation with the US Department of Transportation, Federal Highway Administration.

Gradations containing high, medium, and low percentages of fines were evaluated by laboratory tests and by behavioral responses in situ. Significant differences in strength parameters were not found. Differences in densities were not significant.

Identification Of Shales, Tommy C. Hopkins, Robert C. Deen

Kentucky Transportation Center Research Report

Engineering tests were performed on 40 different types of shales. Both hard and soft shales, as well as shales having histories of embankment failures and shales having little known involvements, were tested. The suitability of ten different slake-durability test procedures were evaluated as a means of broadly characterizing the engineering performance of Kentucky shales. Two procedures devised during the study appeared to better characterize slake-durability properties than procedures previously proposed. Natural water contents and jar slake tests were performed to determine if such tests might provide a fairly rapid means of identifying troublesome shales. The natural water content of a …

Control Of Oxygen And Carbon Related Crystal Defects In Silicon Processing, P. D. Ownby, P. E. Grayson

Materials Science and Engineering Faculty Research & Creative Works

In the production of silicon articles at an elevated temperature, a stream comprising a controlled mixture of an oxygen-containing first gas and a second gas is admitted to the processing chamber. The first gas is one which partially dissociates under the conditions in the chamber to form both oxygen and the second gas. The second gas is one which is not harmful to silicon at the conditions in the chamber. Substantially equilibrium conditions are established in the chamber so that the dissociation of the first gas to oxygen occurs reversibly. The partial pressure of oxygen (P_O2) is sensed …

Street Cuts In County And City Streets, James Mabry Iddins

Indiana Local Technical Assistance Program (LTAP) Technical Reports

This report presents a detailed study of the methods and procedures used by county and city engineers to control street cuts.

Street Cuts In County And City Streets, James Mabry Iddins

Indiana Local Technical Assistance Program (LTAP) Publications

This report presents a detailed study of the methods and procedures used by county and city engineers to control street cuts.

Simple And Direct Determination Of Complex Refractive Index And Thickness Of Unsupported Or Embedded Thin Films By Combined Reflection And Transmission Ellipsometry At 45° Angle Of Incidence, R. M.A. Azzam

Electrical Engineering Faculty Publications

Measurements of the polarization states (represented by complex numbers X_r and X_t, respectively) of light reflected and transmitted by an unsupported or embedded thin film, for totally polarized light (with nonzero p and s components) incident at 45°, permit simple, direct, and explicit determination of the film's complex refractive index N₁ independently of film thickness or input polarization. If α = X_r/X_t, we find that α = r_s + r_s^-1, where r_s is Fresnel’s complex reflection coefficient of the ambient-film interface for the s polarization at …

Domestic Water Heating With Microwave Radiation, Dan Lynn Merchant

Graduate Research Papers

Purpose of the Study

1. To determine if microwave radiation can be safely employed in a domestic water heating system.

2. To determine if microwave radiation can be efficiently and economically employed in a domestic water heating system.

3. To determine if microwave radiation can be effectively employed in a domestic water heating system.

Acuta Enews July 1983, Vol. 12, No. 7

ACUTA Newsletters

In This Issue

PARTY LINE

ANOTHER AT&T

FROM THE BOARD

"MOUTH OF THE SOUTH"

BITS & PIECES

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.

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.

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 …

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

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.

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

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 …