Digital Commons Network^™

Performance Of Buried Flexible Conduits : Interim Report, G. A. Leonards, Robert Edward Stetkar

JTRP Technical Reports

No abstract provided.

A Laboratory Investigation Of Cold-Mix Recycled Bituminous Pavements : Interim Report, Mang Tia

JTRP Technical Reports

No abstract provided.

Sld Potamology Study (S-9), Jerome A. Westphal, Samuel P. Clemence

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Foreword

In this report, the authors discuss factors which relate to flow characteristics of the Middle Mississippi River and its major tributaries. The variety of ways in which man and nature interact to affect the hydrologic regime of the study area are almost infinite. Furthermore, the intensity and direction of man's activity is non-uniform with respect to both time and space. Therefore, on the scale of the study area, the authors assert that 1) it is difficult to verify associations between specific human actions and river responses and 2) at this time, it is impossible to do so in a …

Analysis Of Time-Dependent Consolidation Data, E. Gregory Mcnulty, C. Thomas Gorman, Tommy C. Hopkins

Kentucky Transportation Center Research Report

No abstract provided.

Analysis Of Time-Independent Consolidation Data, E. Gregory Mcnulty, Tommy C. Hopkins, C. Thomas Gorman

Kentucky Transportation Center Research Report

The one-dimensional laboratory consolidation test developed by Terzaghi permits deformation and drainage only in the vertical direction. The stress-strain characteristics of data obtained from this test are normally studied using a semilogarithmic graphical representation, that is, vertical strain or void ratio is plotted as a function of the logarithm of effective stress. Such a representation permits an analysis of the stress history and compressibility characteristics of soils. Knowledge of these material characteristics is of great practical value in the prediction of settlement associated with loading where the effects of lateral consolidation may be neglected.

The National Solar Heating And Cooling Information Center, Jeremy A. Lifsey, Sanford Zane Meschkow

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

The Center is an information service funded by the U.S. Department of Housing and Urban Development and the U.S. Department of Energy as part of a program to foster the use of solar energy in domestic hot water systems and the heating and cooling of buildings. The Center answers questions by mail and over toll-free hot lines, operates a mobile exhibit van and several exhibits that appear at conferences and trade shows, and distributes HUD and DOE publications on solar energy. Users can request lists of addresses of solar design and construction professionals, manufacturers, distributors, banks that have given solar …

Student Attitudes Toward The Free Enterprise System, Henry Metzner, Edwin C. Sims

Engineering Management and Systems Engineering Faculty Research & Creative Works

No abstract provided.

The Effects Of Certain Impurities And Their Interactions On Zinc Electrowinning, Donald R. Fosnacht

Doctoral Dissertations

“The effects of germanium, antimony, arsenic, cobalt, glue, and free acid concentration were studied on both commercial and synthetic electrolytes. The effects of a single factor and the combined effects of multiple factors were elucidated. The temperature, zinc concentration, and current density were also varied. It was found that the acid concentration was the most critical factor when impurity levels were at normal plant solution concentrations. The ranges where the effect of the impurity became apparent were: greater than 20 ppb for antimony; 40 ppb for germanium; 120 ppb for arsenic; and 7-8 mg/l for cobalt for a solution containing …

Measurement Of Poisson's Ratio And Tangent Modulus Of A Loess, Craig Randall Bowers

Masters Theses

"A series of triaxial tests are used to develop mathematical models for tangent modulus and Poisson's ratio for a remolded loessial soil. These two models are then utilized in a finite element computer program to model the behavior of a shallow foundation placed on compacted loess. Different models for Poisson's ratio gave widely varying load settlement curves, however a constant value of .32 gave results very similar to that given by the experimentally developed model. It was found that the model developed for tangent modulus yielded unreasonable results when utilized in the finite element analysis until a limiting value was …

Conference Tutorials-An Opportunity For Continuing Education, John H. Park, William H. Tranter

Electrical and Computer Engineering Faculty Research & Creative Works

The Educational Services Committee of the IEEE Communications Society has sponsored eleven tutorial short courses at its major conferences over the past six years. The experience gained in developing and presenting these tutorials is shared with others so that they may be in a better position to sponsor similar continuing education activities in the future. The conference tutorial is one example of a continuing education activity that can be sponsored by an IEEE Group or Society as a service to its members. Copyright © 1978 by The Institute of Electrical and Electronics Engineers, Inc.

An Investigation Into The Elasticity Of Demand For Motor Gasoline, Samy Fouad El-Iskandarany

Dissertations and Theses

This thesis investigates the existence and determinants of the elasticity of demand for motor gasoline.

The research can be divided into four main stages. In the first stage, time series data of fifteen member countries of the Organization for Economic Cooperation and Development (OECD) are analyzed.

The ratio of gasoline price per gallon to the per capita GNP is introduced in this research to explain the variability in the size of the price elasticities of demand over the various countries. The ratio is called the "Price Factor" and designated as P.F. The introduction of P.F. established the basis for meaningful …

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

United States Department of Defense 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.

Cpacs Happenings (December 1977-January 1978 Newsletter), College Of Public Affairs And Community Service, University Of Nebraska At Omaha

CPACS Newsletters

The College of Public Affairs and Community Service (CPACS) newsletter that reported on the news, collaborations, events, and general happenings of the UNO College of Public Affairs and Community Service. This newsletter has had many names and variations over the years including SPACS Newsletter (1973); Newsletter of the College of Public Affairs and Community Service (1973-1974): Happenings (1974-1980s); and the current e-newsletter titled the CPACS Collective (2021-)

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 …

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 …

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 …

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 of …

So2-Scrubber Technology : Double Alkali Mode, Krishna K. Rao

Theses

Double alkali (D/A) processes for the desulfurization of flue gases occupy an increasingly important role in applied technology.

D/A processes involve two steps, namely, scrubbing and regeneration. In the scrubbing step, the alkali (Na₂SO₃) reacts with SO₂. In the regeneration step the acid formed, NaHSO₃, reacts with an alkali to regenerate Na₂SO₃.

This study was focused on the regeneration step. Regenerants investigated were slurries of lime and limestone. The major factors studied were reactor configuration and mixing patterns.

These systems were investigated in a batch, backmix, and plug-flow …

Municipal Point Source Pollution In The Hackensack Meadowlands Estuary, Alfonso Augustine Hernandez

Theses

A study was performed to evaluate the effectiveness of various sewage treatment facilities in the Hackensack Meadowlands District. The study dealt with overall plant efficiencies based on percent removals of suspended solids and Biochemical Oxygen Demand although other parameters were also included.

Samples for this study were obtained from the inlet and outlet channels of the individual plants. The parameters studied were: Suspended Solids, Biochemical Oxygen Demand, Total Nitrogen, Nitrate-Nitrite Compounds, Total Organic Carbon, Orthophosphate-P, Total Oxygen Demand and Fecal Coliform. Results obtained were averaged so as to collectively represent wet and dry weather conditions.

The results indicate that most …

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 (P_O2) 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, …

Introductory Remarks, Dudley Thompson

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

No abstract provided.

Energy Conservation And U.S. Farm Production Patterns, Angelos Pagoulatos

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

Energy conservation practices in crop production would not substantially reduce energy use. Substantial reductions of energy would imply major structural changes in terms of extensive systems of crop production. The tradeoffs between land and energy for future desired crop outputs are derived.

Stability Of Premixed H₂/O₂/N₂ Combusting Turbulent Jets, H. F. Nelson

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

Experimental measurements and theoretical predictions of the stability of hydrogen-air-nitrogen premixed turbulent flames have been carried out. The turbulent flame is theoretically modeled using finite rate chemical kinetics and a well-stirred reactor. The model contains a free parameter, which is evaluated by comparing the theoretical predictions to experimental results. A hydrogen flame stability experiment was carried out and the results were compared to the theory. The theory and experiment were found to agree, if the free parameter in the theory varied as the reciprocal of the turbulent jet radius squared.

The National Solar Energy Research Institute: Function, Organization, And The First Six Months, Dennis R. Costello

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

The role of the Solar Energy Research Institute (SERI) in the national solar program is discussed. A brief history of developments leading to the formation of SERI is included. Functional responsibilities, organization and the current plans for staff and facilities growth are addressed.

The Environmental Effects Of Uranium Exploration And Mining, Nicholas H. Tibbs, David L. Rath, Thomas K. Donovan

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

Uranium exploration and mining is increasing as the Nation's demand for energy grows. The environmental impacts associated with this exploration and mining are not severe and compare favorably with impacts from the production of other energy resources.

Current State-Of-The-Art Of Electrochemical Batteries From A Users Point Of View, John G. Wolter, John A. Gilbert, James V. Leonard

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

This paper will present a description of some of the battery types (couples) on the market, energy densities, and recycle lives. The possibility that some of these could be used in the transportation industry will be explored. Speculation of future battery development will be discussed.

Dissolution Of Kansas Evaporites, The Radioactive Waste Disposal Problem, Barbara J. Smith

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

The radioactive waste repository at Lyons, Kansas, focused attention on the problem of evaporite dissolution. More study is needed in the determination of the mechanisms responsible for deterioration. Also recent water use policies have been questioned with the need pointed out for increased effectiveness in planning. Good water planning has to take into account the role of evaporite dissolution in water quality.

Steam Raising With Low-Btu Gas Generators And Potential For Other Applications, Robert Owen Williams, John R. Goss, Brian C. Horsfield, Robert Hodam

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

A pilot plant gas producer was installed at a Walnut processing plant to recover usable energy from cracked walnut shell. The shell was converted to a low-Btu fuel gas (producer gas) and this was used to replace natural gas in a steam boiler. Longterm continuous operation of the producer has yet to be achieved due to mechanical inadequacies of the fuel feed and grate systems. These problems are a result of special fuel characteristics of walnut shell, which are being further investigated on a laboratory scale gasifier. It is expected that component changes and/or fuel preparation can facilitate satisfactory long …

Household Energy Availability And Use -- A Systems Theory Formulation, Charles Geiger, Milton E. Harvey

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

Systems theory provides an excellent perspective, as well as methodology, for analyzing energy problems of availability and use. The linear systems format is applied here to a system which focuses on household energy, energy independence, and energy conservation. Z-transform analysis can be used to simplify the mathematical operations required in this model.