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1977

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Articles 1 - 30 of 452

Full-Text Articles in Engineering

An Experimental Investigation Of The Hole-Drilling Technique For Measuring Residual Stresses In Welded Fabricated Steel Tubes, Chau Mong Tran Dec 1977

An Experimental Investigation Of The Hole-Drilling Technique For Measuring Residual Stresses In Welded Fabricated Steel Tubes, Chau Mong Tran

Dissertations and Theses

Among semi-destructive methods of measuring residual stresses in elastic materials, the blind hole-drilling strain-gage method is one of the best because it is simple, economical and accurate. It is based on the measurement of strains disturbed by machining a small diameter shallow hole in the test piece. The strains measured in three known directions permit the determination of the direction and magnitude of principal stresses and subsequently of any stress in any direction.

This thesis presents the investigation of residual stresses in the longitudinal direction of a welded fabricated steel tube of 22 inch diameter, relating to a series of ...


Extreme Thoughts | Nitro Ultra-Maxx Review, Nicolel Bell Dec 1977

Extreme Thoughts | Nitro Ultra-Maxx Review, Nicolel Bell

Retroslim Forskolin

We have no disgrace. We think Nitro Ultra-Maxx is great. What's more, we need YOU to have it. Since, we thoroughly bolster your rec center propensity. Also, we realize how GOOD it feels to get those hard, tore muscles you're searching for. Truly, we wish the entire world was as roused as you. We get so energized when we see new offers like this that we just can hardly wait for you to arrange. In this way, if for reasons unknown you haven't begin Ordering Nitro Ultra-Maxx RIGHT NOW, it would be ideal if you begin your ...


Recording Soil Penetrometer, William I. Baldwin, Wesley F. Buchele Dec 1977

Recording Soil Penetrometer, William I. Baldwin, Wesley F. Buchele

Iowa State University Patents

A recording soil penetrometer comprising a frame hav- [11] [45] 4,061,021 Dec. 6, 1977 ing upper and lower ends with a penetration probe extending downwardly from the lower end of the frame for penetration of the ground. A handle is operatively yieldably vertically movably mounted on the upper end of the frame for forcing the probe downwardly into the ground. A recording drum is rotatably mounted, about a vertical axis, on the frame and is adapted to have pressure sensitive recording paper mounted thereon. A ground-engaging apparatus is vertically movably mounted on the lower end of the frame ...


Development And Field Testing Of An Electronic Information Exchange System : Final Report On The Eies Development Project, Computerized Conferencing & Communications Center, Murray Turoff, Starr Roxanne Hiltz Dec 1977

Development And Field Testing Of An Electronic Information Exchange System : Final Report On The Eies Development Project, Computerized Conferencing & Communications Center, Murray Turoff, Starr Roxanne Hiltz

Computerized Conferencing and Communications Center Reports

The Electronic Information Exchange System (EIES) is a particular design of a computerized conferencing system intended to allow both the facilitation of scientific and technical communications and experimentation and research into human information-communication processes. To meet the first objective EIES offers functional components of messaging, conferencing, notebooks and bulletins for its users. To meet the second objective EIES allows for the tailoring of interfaces by individuals and groups, and the incorporation of special processing and interconnect options to other computer and information systems.

EIES is designed as a research tool or laboratory without walls in order to allow information scientists ...


Official Phone Directory, Us Army Foreign Science And Technology Center, Robert Bolin , Depositor Dec 1977

Official Phone Directory, Us Army Foreign Science And Technology Center, Robert Bolin , Depositor

DOD Military Intelligence

This directory contains instructions for using various telephone systems and calling long distance, a thorough organizational listing, a quick reference guide, an alphabetic list of employees, and a world time conversion chart. The organizational listing gives the lists each division and the branches within it and the heads of the divisions and branches with their phone numbers. The list of employees includes the person’s name, his or her office extension and home phone number, office symbol, and room number. If the person listed was not located in Charlottesville, the alphabetic list tells where they were.


Flexible Pavement Designs To Support Various Vehicle Configurations, Robert C. Deen, Herbert F. Southgate Dec 1977

Flexible Pavement Designs To Support Various Vehicle Configurations, Robert C. Deen, Herbert F. Southgate

Kentucky Transportation Center Research Report

Pavement designers are often asked if pavements can be designed to carry and support the unusually heavy loads which have been known to use portions of the highway system. In some instances, for example, haul roads leading to highway or other construction projects or haul roads associated with mining, heavy loads have become commonplace and extra-legal. Within limitations of engineering experience, there appears to be no reason why pavements cannot be designed for these heavy loads. Of course, the restrictive factor in implementing such designs may be the excessive costs of construction. Even so, excessive maintenance costs otherwise associated with ...


Report Of Laboratory Tests And Analytical Sudies Of Structural Characteristics Of Cold-Formed Steel-Joist Floor Systems, J. F. Wiss, P. W. Linehan, R. J. Kudder Dec 1977

Report Of Laboratory Tests And Analytical Sudies Of Structural Characteristics Of Cold-Formed Steel-Joist Floor Systems, J. F. Wiss, P. W. Linehan, R. J. Kudder

AISI-Specifications for the Design of Cold-Formed Steel Structural Members

No abstract provided.


Beach Erosion And Accretion At Virginia Beach, Victor Goldsmith, Susan C. Strum, George R. Thomas, Coastal Engineering Research Center (U. S. ) Dec 1977

Beach Erosion And Accretion At Virginia Beach, Victor Goldsmith, Susan C. Strum, George R. Thomas, Coastal Engineering Research Center (U. S. )

Reports

This report is published to provide coastal engineers with a description of beach erosion and accretion at Virginia Beach, Virginia, including the effect of continuing beach replenishment, and the apparent unimportance of land use in determining erosion. This report also provides bench-mark data on coastal processes at the shore north of the CERC Field Research Facility at Duck, North Carolina. The work was carried out under the beach evaluation program of the U.S. Army Coastal Engineering Research Center (CERC).


Computer Graphics: Conversion Of Contour Line Definitions Into Polygonal Element Mosaics, Thomas W. Sederberg Dec 1977

Computer Graphics: Conversion Of Contour Line Definitions Into Polygonal Element Mosaics, Thomas W. Sederberg

Theses and Dissertations

There has been a disparity between the conventional method of describing topographic surfaces (i.e. contour line definition) and a format of surface description often used in continuous-line computer graphics (i.e. panel definition). The two differ enough that conversion from contours to panels is not a trivial problem. A computer program that performs such a conversion would greatly facilitate continuous tone display of topographical surfaces, or any other surface which is defined by contour lines.

This problem has been addressed by Keppel and alluded to by Fuchs. Keppel's is a highly systematic approach in which he uses graph ...


An Application Of Infrared Spectroscopy To The Study Of Binder Migration In Paper Coatings, Fred E. Huang Dec 1977

An Application Of Infrared Spectroscopy To The Study Of Binder Migration In Paper Coatings, Fred E. Huang

Master's Theses

Multiple internal reflectance (MIR) was used to study binder migration of paper coatings. Casein and an acrylic latex were selected as binders because of their characteristic infrared absorption bands. The coatings analyzed were prepared on the Western Michigan University Pilot Coater using the airknife coating method at different coating speeds. A surface grinder was used to obtain several layers of coating for surface studies.

It was concluded that the MIR technique could satisfactorily be used in the binder migration studies. Its success mainly depends on the precision of surface grinding, caliper measurement and infrared characteristics of the binders. The results ...


Light Extinction In Polydisperse Particulate Systems, Lee W. Casperson Dec 1977

Light Extinction In Polydisperse Particulate Systems, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

Analytic methods are developed for determining the attenuation characteristics of light beams propagating through ensembles of scattering particles including those with complex index of refraction. The methods are applicable to a wide range of practical particulate systems, and the results are expressed explicitly in terms of elementary functions. Propagation through fog and clouds is considered as an example, and it is found that absorption by the liquid lengths. water in such ensembles affects strongly the extinction for ir wave-lengths


Assessment Of Feasibility Of Proposed Bolted Connections For Tubular Structures, John Henry Tausch Nov 1977

Assessment Of Feasibility Of Proposed Bolted Connections For Tubular Structures, John Henry Tausch

Dissertations and Theses

The search for new and additional sources of energy -- from sun, wind, waves, and ocean currents -- is necessitating the development of structures in the open environment of the oceans as well as on land. The advantages of round or tubular members for use in such structures are shown; and to avoid the uncertainties of welded joints, two bolted connections are proposed and their feasibility explored.


Traffic Conflicts, Erratic Maneuvers, And Near-Miss Accidents: State-Of-The-Art, Charles V. Zegeer Nov 1977

Traffic Conflicts, Erratic Maneuvers, And Near-Miss Accidents: State-Of-The-Art, Charles V. Zegeer

Kentucky Transportation Center Research Report

Definitions are given for the various types of traffic conflicts, erratic maneuvers, and near-miss accidents. The General Motors technique for observation of traffic conflicts is summarized. Procedures used by several highway agencies for collecting conflict data are also detailed. Criteria which have been used to identify hazardous intersections using traffic conflict data are summarized. Methods and examples of evaluating safety improvements are detailed. Relationships between conflicts and accidents found by others were given.

The procedure for observing traffic conflicts on freeway ramps is described. Definitions are given for erratic maneuvers at lane drops, gore areas, and intersections. Results from studies ...


The Maine Airport System Plan : Summary Report, Systems Analysis & Research Corp. Nov 1977

The Maine Airport System Plan : Summary Report, Systems Analysis & Research Corp.

Maine Collection

The Maine Airport System Plan : Summary Report

Prepared for Bureau of Planning , Maine Department of Transportation by Systems Analysis & Research Corporation and Howard Needles Tammen & Bergendoff, November 1977.

Contents: Foreword / Overview / Background / Aviation in Maine / Preparation of the Plan / The Plan / Implementation of the Plan / Appendix A - Airport Needs by County / Appendix B - Airport Classifications / Appendix C - Maine's Airports by Map Code Identifier / Appendix D - Technical Supplement Table of Contents / Appendix E - Regional Planning Commissions / Appendix F - Advisory Committee Membership / Appendix G - Glossary / Map of Maine's Airports


Analysis Of Tandem Axleloads By Elastic Theory, Herbert F. Southgate, Robert C. Deen, James H. Havens Nov 1977

Analysis Of Tandem Axleloads By Elastic Theory, Herbert F. Southgate, Robert C. Deen, James H. Havens

Kentucky Transportation Center Research Report

AASHO Road Test tandem axleloads were analyzed to determine the magnitude of the tandem axleload that causes the same damage as the 18-kip (80-kN) single axleload. The procedure is outlined and is the same used to analyze single axleloads. The essential findings were as follows:

1. One repetition of a 34-kip ( 151-kN) tandem axleload appears to cause the same damage as one repetition of an 18-kip (80-kN) single axleload. 2. The relationships of log repetitions versus axleload used by Kentucky appear to be equally valid for single and tandem axleloads. 3. The use of superposition principles, and equivalency of repetitions ...


Traffic Conflicts As A Diagnostic Tool In Highway Safety, Charles V. Zegeer, Robert C. Deen Nov 1977

Traffic Conflicts As A Diagnostic Tool In Highway Safety, Charles V. Zegeer, Robert C. Deen

Kentucky Transportation Center Research Report

Because of the shortcomings in accident data, such as incomplete reporting and inaccurate information on accident reports, a need was found for indicators of accident potential. Nearly half of the 209 locations identified in Kentucky as hazardous by accident criteria were found to be falsely identified due to random accident occurrences. Accident repeatability from one year to the next was found to be poor at 60 intersections (r = 0.64) and 170 spot locations (r = 0.59). Up to two years of accident data were found to be necessary to obtain a reliable base of accident data.

Conflict counts were ...


Kentucky’S Pavement Management System, James H. Havens, Eugene B. Drake Nov 1977

Kentucky’S Pavement Management System, James H. Havens, Eugene B. Drake

Kentucky Transportation Center Research Report

Pavement management concepts are discussed, and a method is presented illustrating the required data and its use to accumulate EAL's annually for comparison with the design EAL. This method can be used to determine overlay priorities, overlay design thicknesses, and financing schedules. A discussion of automatic feedback of field data is presented. Pavement condition reports should be analyzed separately to prevent improper adjustments in the design system due to causes of failure other than normal fatigue.

An overlay, whether for extending service life or improving skid resistance, provides an additional structural thickness and will modify the design life.

Preparation ...


Reliability And Surface Degradation Aspects Of Synthetic Insulator Materials For Hv Application, Satyapal S. Bhatia Oct 1977

Reliability And Surface Degradation Aspects Of Synthetic Insulator Materials For Hv Application, Satyapal S. Bhatia

Dissertations

This study is a theoretical and experimental investigation on the state of the art of synthetic insulators for outdoor high voltage transmission systems.

The surface of a polymeric material is known to be degraded by, among other things, environmental stresses such as UV, air pollutants, etc. The reliability of an insulator material is governed by the surface and other characteristics that do not drift much as a function of stresses and time.

The surface characteristics of various synthetic materials, when these materials were exposed to UV radiation in the laboratory were studied. The changes in the surface properties of these ...


Dense Chromium Sesquioxide, P. D. Ownby Oct 1977

Dense Chromium Sesquioxide, P. D. Ownby

Materials Science and Engineering Faculty Research & Creative Works

A sintered, fine grained, polycrystalline, essentially fully dense, essentially single phase Cr2O3 body is prepared by sintering Chromium Sesquioxide (Cr2O3) at essentially the equilibrium oxygen partial pressure (PO2) for the formation of CrO 3 from its elements at the sintering temperature. To achieve optimum theoretical density a second metal oxide dopant such as MgO, capable of controlling the grain size, is added. In addition, Cr2O3 bodies are rendered more stable, and thus have a longer life, by maintaining over the body an atmosphere which is essentially equilibrium Po, for the ...


Drug Induced Changes In Ventricular Defibrillation Threshold, Charles F. Babbs Oct 1977

Drug Induced Changes In Ventricular Defibrillation Threshold, Charles F. Babbs

Open Access Dissertations

No abstract provided.


Integrated Urban Transportation ‑ A Major Challenge For Transportation Engineers, Vukan R. Vuchic Oct 1977

Integrated Urban Transportation ‑ A Major Challenge For Transportation Engineers, Vukan R. Vuchic

Departmental Papers (ESE)

Pedestrians, private automobile, public transpor­tation and other modes are components of a total urban transportation system. However, for historical reasons and because of major differences in their physical, operational and cost characteristics, different modes are being planned and operated by different organizations or public agencies.


Environmental Manpower And Training, Harold M. Cota Oct 1977

Environmental Manpower And Training, Harold M. Cota

Civil and Environmental Engineering

No abstract provided.


Which Mode Can Save Most Energy? No Simple Answer Exists, Vukan R. Vuchic Oct 1977

Which Mode Can Save Most Energy? No Simple Answer Exists, Vukan R. Vuchic

Departmental Papers (ESE)

Written testimony commenting on the CBO's report, "Energy Saving Potential of Urban Mass Transit," submitted for the Senate Committee on Environment and Public Works hearing on the 5th of October,1977.


Ole Miss Engineer 1977 Oct 1977

Ole Miss Engineer 1977

The Ole Miss Engineer

No abstract provided.


Computer Storage Of Traffic Volume Data, Marvin Virgin Oct 1977

Computer Storage Of Traffic Volume Data, Marvin Virgin

Kentucky Transportation Center Research Report

LOADVOL is a program developed to assimilate raw traffic volume data into a more readily usable form. Several identifying parameters are added to enhance the clarity and to extend the utility of the data base.

Criteria were set to detect possibly erroneous traffic count data. LOADVOL detects and replaces "erroneous" data with simulated data. LOADVOL produces cards which contain the orignal data which are replaced. Thus, the original data can be reviewed, and it can be ascertained whether it is erroneous or was affected by a special event, holiday, location, traffic recorder malfunction, or some other occurrence.

UPDATE, a second ...


Cracking In Continuously Reinforced Concrete Pavements, James H. Havens, Robert C. Deen, Assaf S. Rahal, Wm. Vernon Azevedo Oct 1977

Cracking In Continuously Reinforced Concrete Pavements, James H. Havens, Robert C. Deen, Assaf S. Rahal, Wm. Vernon Azevedo

Kentucky Transportation Center Research Report

The objective of this study was to monitor placement and evaluate performance of continuously reinforced concrete pavement with an emphasis on determining the time of cracking and crack interval. This paper reports on the design and construction practice for CRCP in Kentucky. Data on crack frequency and time of cracking is also included in an attempt to further explain the cracking pattern associated with CRCP.


An Annotated Bibliography Of Ocs Documents In Maine, Maine State Planning Office Oct 1977

An Annotated Bibliography Of Ocs Documents In Maine, Maine State Planning Office

Maine Collection

An Annotated Bibliography of OCS Documents in Maine

Outer Continental Shelf Memorandum 1

Compiled by Edward H. Shenton & Charles S. Colgan

Maine Coastal Program, Maine State Planning Office, Augusta, Maine, 1977.

Contents: 1. Introduction / 2. OCS - General / 3. OCS - Federal Regulations / 4. Economic Aspects / 5. Environmental Studies / 6. Oil Spills - Effects and Studies / 7. Onshore Effects / 8. The North Sea Experience / 9. Legal Aspects / 10. Petroleum Drilling Technology


Reliability Of Mos Devices : Threshold Voltage Instability, Sesha Rajamani Shankar Sep 1977

Reliability Of Mos Devices : Threshold Voltage Instability, Sesha Rajamani Shankar

Dissertations

A very important factor in the reliability of MOS devices is the stability of the threshold voltage. This dissertation examines the effects of positive and negative gate bias stresses at elevated temperatures on the drift in the threshold voltage of MOS field effect transistors.

Over 400 p-channel enhancement mode devices were life tested under different temperature and gate bias conditions for periods of up to 15,000 hours, and the drift in their threshold voltages studied and analyzed. It was found that under both negative and positive bias-temperature tests, the threshold voltage drifted towards more negative values, though in the ...


Highway Finance: County Roads - City Streets, Herpic Sep 1977

Highway Finance: County Roads - City Streets, Herpic

Indiana Local Technical Assistance Program (LTAP) Publications

This document provides historical bench-mark dates for highway finances in Indiana. It also provides information on the Motor Vehicle Highway Account and the Load Road & Street Account.


Single-Element Rotating-Polarizer Ellipsometer For Film-Substrate Systems, A.-R. M. Zaghloul, R. M.A. Azzam Sep 1977

Single-Element Rotating-Polarizer Ellipsometer For Film-Substrate Systems, A.-R. M. Zaghloul, R. M.A. Azzam

Electrical Engineering Faculty Publications

A novel and very simple ellipsometer for the characterization of film-substrate systems that employs one rotating optical element (a polarizer) is proposed. The ellipsometer is based on detecting the angles of incidence at which a film-substrate system has equal amplitude attenuations for light polarized parallel (p) and perpendicular (s) to the plane of incidence. At a certain wavelength, the film thickness of the filmsubstrate system has to lie within permissible-thickness bands (PTB) for the technique to apply.