Engineering Commons^™

Rural Recreational Travel In Kentucky, Jerry G. Pigman

Kentucky Transportation Center Research Report

The purpose of this study was to develop a methodology for predicting travel patterns on routes leading to outdoor recreational areas in Kentucky. Data were collected by means of a license-plate, origin-destination survey at 160 sites within 42 recreational areas and by means of a continuous vehicle counting program at eight of these sites. Results indicate that the method of associating similar facilities is a reliable procedure for predicting traffic characteristics. Vehicle occupancy was found to depend on the type of recreational area, distance traveled, and vehicle type. Percentages of various vehicle types were also influenced by the type of …

Skid Resistance Of Pavements [Sept. 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. Asphaltic concrete 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 asphalt …

Skid-Test Trailer: Description, Evaluation And Adaptation, Rolands L. Rizenbergs, James L. Burchett, Cass T. Napier

Kentucky Transportation Center Research Report

A two-wheeled skid-test trailer and towing vehicle were acquired in 1969. The trailer was designed primarily for measurement of steady-state friction at and above normal traffic speeds. Measurement of instantaneous wheel loads also permitted determination of peak or incipient friction. Factors and variables associated with the testing device and calibration and test procedures were investigated and standardized, and the trailer was adopted for routine testing. Comparative tests with the trailers of General Motors, Ohio, and West Virginia were conducted, and the data were correlated. The interim standard method of test using an automobile was correlated with the trailer to permit …

World War I And Beyond, Tim Brady

Publications

Traces the beginnings of military aircraft in the United States, from the Wright Brothers in 1907 to the expansion of the U.S. Air Corps in 1938.

Accidents On Rural Interstate And Parkway Roads And Their Relation To Pavement Friction, Cass T. Napier

Kentucky Transportation Center Research Report

Friction measurements were made with a skid trailer at 70 mph on 820 miles of rural, four-lane, controlled-access routes on the interstate and parkway systems in Kentucky. These facilities were subdivided into test sections and half-mile sites. Accident experience, friction measurements and traffic volumes were obtained for each subdivision.

The expression of accident occurrence which correlated best with skid resistance was wet-surface accidents per 100 million vehicle miles. There was a definite trend exhibiting a rapid decrease of accidents with increasing Skid Number (70 mph) to 26 ± 1; thereafter, with increasing Skid Numbers, the rate of decrease was considerably …

Analysis Of Multistory Frames With Light Gauge Steel Panel Infills, Craig J. Miller, Robert G. Sexsmith, Arthur H. Nilson

CCFSS Library (1939 - present)

PREFACE This report was originally presented as a thesis to the Faculty of the Graduate School of Cornell University in partial fulfillment of the requirements for the degree of Doctor of Philosophy, conferred in August 1972. The author wishes to thank Professor Arthur H. Nilson, Project Director, and Professor Robert G. Sexsmith, Principal Investigator, for the help and guidance that made this work possible. This investigation was supported by the American Iron and Steel Institute.

Fm 30-16, Technical Intelligence, 1972, Robert L. Bolin

United States Department of Defense Military Intelligence

This manual reflects the lessons learned about technical intelligence during World War II, Korea, and Vietnam. The manual explains the theory of Army technical intelligence and describes strategic technical intelligence organizations in the United States.

Much of the manual explains technical intelligence activities of US forces in the field. It explains technical intelligence planning and collection activities. The need to label and handle captured equipment properly is stressed.

Appendices list references and technical intelligence categories, provide a sample technical intelligence plan, and explain handling and reporting of captured materiel and the standard nomenclature system for identifying Soviet bloc weapons and …

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 …

A Study Of The Prevalent Categories Of Conflict As Perceived By The Architect And The School Client On School Construction Projects In Indiana, Tracy Dust

All-Inclusive List of Electronic Theses and Dissertations

In view of the complexities which are now involved in school facility construction, it is paramount that the relationship between the architect and his school client develop fully and that it be based upon a clear and mutual understanding of role expectation. The school board, as the hiring agency, is characteristically composed of laymen both in the field of education and in the field of heavy construction. They must rely upon the judgment of the architect regarding the design features of the proposed facility and must depend upon their superintendent and his staff for determining educational program requirements.

Application Of Gravity And Intervening Opportunities Models To Recreational Travel In Kentucky, Kenneth D. Kaltenbach

Kentucky Transportation Center Research Report

Weekend outdoor recreational travel has a major impact on the highway network in Kentucky. Data from a previous study (1) indicate that the number of people visiting 42 typical Kentucky outdoor recreation areas on an average summer Sunday in 1970 was approximately 260,000. Most of these 42 areas, by virtue of their outdoor nature, are located in rural settings. Most have access to major arterial highways only by means of narrow, low standard rural roads. Traffic generated by the recreation areas and their associated developments severely strains these secondary access highways and places a significant additional load on the rural …

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.

Peak Temperature Distribution In Steel Plates During Arc-Welding, Bhanuprakash M. Patel

Theses and Dissertations

The welding of steel plays an important role as a major fabricating process in industry. In the field of welding metallurgy, much attention is given to the effects which a welding arc or flame will have on the structure and properties of the metals being joined. The engineer is interested in the intensify and extent of physical changes brought about by the unavoidable heat treatment which accompanies the execution of a weld. In order to gain some quantitative appreciation of the way in which the metallurgical effects of welding depend on welding variables, geometry, and physical properties, considerable attention has …

An Experimental Investigation Of The Relation Between The Cooling Rate And Welding Variables In Fusion Welding, Sujit Biswas

Theses and Dissertations

In the field of welding metallurgy, much attention is given to the effects which the welding arc or flame will have on the structure and properties of the metals being joined. The engineer is interested in the intensity and extent of physical changes brought about by the unavoidable "heat treatment" which accompanies the execution of a weld.

Application Of The Finite Element Method Using The Method Of Weighted Residuals To Two Dimensional Newtonian Steady Flow With Constant Fluid Properties, Mien Ray Chi

Theses and Dissertations

In this thesis we will be concerned with the two-dimensional steady laminar Newtonian fluid flow with constant fluid properties in Cartesian coordinate system. More precisely, we will consider a flow for which the interesting dependent variables, for example, velocity, vorticity, stream function, etc., are expressible as functions of two independent Cartesian coordinates.

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 …

14th Annual Rocky Mountain Spectroscopy Conference

Rocky Mountain Conference on Magnetic Resonance

Program and abstracts from the 14th annual meeting of the Rocky Mountain Spectroscopy Conference, sponsored by the Rocky Mountain Section of the Society for Applied Spectroscopy. Held in Denver, Colorado, July 31 - August 1, 1972.

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."

Design Of Near-Time-Optimal Feedback Controllers., Chon Ho Hyon

Electrical and Computer Engineering ETDs

This dissertation presents a method for designing near-time-optimal feedback controllers of time-invariant linear normal systems in which the system matrix is negative definite and the control input is a bounded scalar function.

The basic design approach is to systematically construct a sequence of multiplane (piecewise linear) suboptimal switching surfaces which converges to the optimal switching surface and to test the quality of the suboptimal switching surface constructed in each iteration until one which satisfies the relative (optimal/suboptimal) performance criterion given a priori is obtained.

Continuous Crystallization Of High Explosives, Larry E. Hatler

Chemical and Biological Engineering ETDs

Nitroguanidine (NQ) is a high explosive which is commercially available in low bulk density form (0.20 to 0.30 gms/cm³). This low bulk density limits its usefulness as an explosive. High bulk density NQ can be produced from a NQ-N, N-dime-thylformamide-Versamid 125 system when crystallized in a mixed suspension mixed product removal crystallizer. Bulk densities ranged from 0.92 to 1.05 gms/cm³ for the operating conditions used. The effect of agitator speed, growth rate, and solids concentration on nucleation rates was determined using a multiple linear regression technique. The resulting equation is: B₀ = 0.19 (RPM) ^1.54 (G) …

Entropy Reduction Of English Text Using Variable Length Grouping, Vincent Norman Ast Jr.

Dissertations and Theses

It is known that the entropy of English text can be reduced by arranging the text into groups of two or more letters each. The higher the order of the grouping the greater is the entropy reduction. Using this principle in a computer text compressing system brings about difficulties, however, because the number of entries required in the translation table increases exponentially with group size. This experiment examined the possibility of using a translation table containing only selected entries of all group sizes with the expectation of obtaining a substantial entropy reduction with a relatively small table.

An expression was …

A New Optimization Procedure For Digital Simulation, Donald Howard Schroeder

Electrical and Computer Engineering ETDs

The theory needed to define and obtain an optimized digital simulation of a given continuous system is presented in this dissertation. The frequency domain approach to simulation is used and a nonlinear function minimization algorithm, implemented on a digital computer, is incorporated to obtain the optimum simulation.

The discrete transfer function obtained from z-transform theory is used to represent the digital system. The frequency domain response of this discrete transfer function can then be expressed simply as a function of frequency, for frequencies up to one-half the sampling frequency. A frequency domain error measure, in the complex plane, is defined …

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.

Dispersion In Laminiar Flow Of Non-Newtonian Fluids, Subhash N. Shah

Chemical and Biological Engineering ETDs

In the present investigation, Taylor's analysis of the dispersion of solutes in laminar flow of a Newtonian fluid through a circular tube was extended to the case of a non-Newtonian Eyring model fluid. A new approach was taken to solve the convective diffusion equation for the Eyring model fluid. This approach incorporates the use of the dimensionless longitudinal pressure gradient and the mean velocity to obtain the dimensionless concentration. Using an approach similar to that of Taylor, a solution of the diffusion equation was obtained for quantities such as the dimensionless concentration, mean concentration, and effective dispersion coefficient as a …

Moment-Curvature-Thrust Relationships In Hybrid Members, Douglas Wrenn Fiala

Dissertations and Theses

In order to overcome the difficulties encountered in closed form solutions, moment-curvature-thrust relationships are developed for hybrid and nonhybrid cross sections utilizing an open form method. The use of horizontal sectors permits the inclusion of residual stresses and/or nonbilinear stress-strain relationships, if desired. Theoretical and experimental data are compared. Applications to circular tubes and other cross sections are discussed. Results indicate that open form solutions are feasible for calculating moment-curvature-thrust data. Hybrid cross sections are easily treated by open form solutions.

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 …