Engineering Commons^™

Review Report For Water Resources Development Missouri River South Dakota, Nebraska, North Dakota, Montana, Volume 2 Of 3

United States Army Corps of Engineers, Omaha District

The purpose of this study is to investigate a wide range of water resources problems and opportunities all having in common some link with the Missouri River. A number of outstanding, interrelated Congressional actions affecting the river reach upstream from Sioux City have been consolidated under this investigation. Authority to combine five outstanding surveys is contained in Office, Chief of Engineers' (DCE's) first indorsement to Missouri River Division letter of 3 July 1972, subject: "Consolidation of Survey Investigations of the Metropolitan Region of Kansas City, the Platte River in Nebraska, and the Missouri River from Sioux City to Fort Peck …

Wildlife Habitat Evaluation Of The Unchannelized Missouri River In South Dakota, James R. Clapp

United States Army Corps of Engineers, Omaha District

Areas of eight habitats were identified, delineated, and measured along the unchannelized Missouri River in South Dakota. Agricultural and urban developments existed on 60 percent of the land within 1 km of the river. Six habitat types made up the non-developed land in the study area: cottonwood-dogwood (16 percent), cottonwood-willow (9 percent), elm-oak (7 percent), cattail marsh (3 percent), sand dune (3 percent), and sand bar (1 percent). All non-developed habitats except sand bar were sampled to obtain vegetative composition and to determine their value to wildlife. The value of each habitat to nine faunal groups of wildlife was subjectively …

Feedlot Runoff Holding Ponds-Nutrient Levels And Related Management Aspects, Elbert C. Dickey, D. H. Vanderholm

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Collection, storage, and ultimate land disposal of livestock feedlot runoff is becoming a more common practice as a result of increasing state and federal regulations prohibiting uncontrolled discharge of runoff. As a result of chemical, physical, and biological actions during the storage phase, the runoff applied to land from storage is often greatly different from that entering storage directly from the feedlot. This study was designed to observe those changes in the runoff during storage, and to evaluate their effect on land disposal practices. Six concrete paved feedlots with runoff control systems were studied, with emphasis on variations in nitrogen, …

Potential-Selective Deposition Of Copper From Chloride Solutions Containing Iron, Ralph E. White, James A. Trainham, John Newman, Thomas W. Chapman

Faculty Publications

The hydrometallurgy of copper may involve leaching of the metal from its ore with an aqueous solution containing cupric and ferric chloride. The subsequent deposition of copper from such a process stream is modeled here in an idealized electrochemical cell with a rotating-disk electrode. The potential distribution and concentration profiles within the diffusion layer are predicted for given potential differences between the electrode and the solution. The cuprous ion, which is formed by the reduction of the complexed cupric ion at the electrode, is stabilized in the chloride solution and can react either at the electrode or with ferric species …

Theoretical And Experimental Investigation Of Oil Recovery By The Electrothermic Technique, Samy Abdel-Hakeem El-Feky

Doctoral Dissertations

"This work investigates the feasibility of increasing oil recovery from petroleum reservoirs by the electrothermic technique. A mathematical model was developed for the prediction of reservoir response to heating by alternating electric current flow through the oil-bearing formations. The mathematical model was programmed in FORTRAN for solution on the IBM 370/168. The model used the finite difference technique to represent the differential equations that describe the system, and the sets of difference equations were solved by the Strongly Implicit Procedure (SIP) and Successive Overrelaxation (SOR).

In order to verify the mathematical model, a set of experiments was conducted to determine …

An Innovative Instructional Unit On Manufacturing Concepts And Terminology For Junior High Industrial Arts, James K. Martin

Dissertations and Theses @ UNI

Although educators recognize the need for educational experiences that provide students with a basic understanding of the industrial technologies, too often students are not receiving the "hands-on" experiences related to industry. Numerous curriculum programs have been developed to provide the teacher with the necessary instructional materials and also provide students with educational-occupational guidance for the world of work. Yet, many of these programs are not being utilized by industrial arts educators.

Research has shown that most manufacturing curricula range from one to two semesters in length. In order for the teacher to wholly adopt one of these programs, considerable organizational …

Strength Of Cold-Formed Steel Beam Webs In Bending, Shear, And A Combination Of Bending And Shear, Roger A. Laboube

Doctoral Dissertations

"An extensive experimental investigation has been conducted to study the load-carrying capacity of cold-formed steel web elements subjected to bending stress, shear stress, and a combination of bending and shear stresses. Emphasis has been concentrated on the instability and postbuckling strength of beam webs.

In the study of beam webs subjected only to bending, the postbuckling strength of web elements and the effect of the compression flange on the moment capacity have been carefully evaluated for beams having stiffened and unstiffened flanges. Based on 84 test results, formulas have been developed to predict the ultimate moment capacity of cold-formed steel …

Experimental Study Of The Dynamic Response Of Highway Bridges : Interim Report, Peter Karl Kropp

JTRP Technical Reports

No abstract provided.

Control Of Population Densities Surrounding Nuclear Power Plants, A. V. Nero, C. H. Schroeder, W. W.S. Yen

Faculty Scholarship

In view of the requirement that the California Energy Resources Conservation and Development Commission must specify land-use/population density control measures to be used in the vicinity of nuclear power plants being granted land use, the possible forms of such measures are examined. Since these measures must maintain population densities below Nuclear Regulatory Commission criteria, if appropriate, NRC criteria for land use and population densities are given particular attention. In addition, a preliminary comparison of the cost of possible control measures with the reduced potential for damage to the public health and safety is made, yielding the result that control measures …

Transportation Research Reports Issued By The Division Of Research, Robert C. Deen

Kentucky Transportation Center Research Report

A bibliographic listing of research reports issued by the Division of Research, Kentucky Bureau of Highways.

Traffic Speed Report No. 102 : Interim Report, James Robert Mekemson, George K. Stafford

JTRP Technical Reports

No abstract provided.

Correlation Of Design And Control Characteristics With Accidents At Rural Multi-Lane Highway Intersections In Indiana : Interim Report, Maren Peter Van

JTRP Technical Reports

No abstract provided.

Modeling Of A Fossil-Fired Power Plant For Real-Time Simulation, Robert Douglas Busch

Chemical and Biological Engineering ETDs

Computer simulation of complex physical systems can be a useful technique in analyzing the multitude of interactions occurring in such systems. Real-time modeling of power plants is particularly useful in operator training and engineering research programs. Towards this end, a small-scale simulator has been developed using a dedicated minicomputer. Major components of a drum-type fossil-fired power plant were modeled using first principle, physical equations, and then the component modules were interconnected to form the simulation package. Support routines were written to provide real-time operation, periodic data storage, continuous data display, interrupt capabilities, and manipulation of control variables. The package presently …

Design Of A Microprocessor Controlled Telecommunication System, George J. Maroutsos

Dissertations and Theses

Recent advancements in Large Scale Integration Technology have made available devices, such as microprocessors, analog gates and "three state" logic, that provide the designer with a wide range of possibilities in the design of telecommunication systems. A microprocessor and analog gates are utilized in this design to demonstrate the feasibility of implementing a flexible Telecommunication System. The microprocessor is programmed to control, through software, the system functions. The feasibility of systems highly adaptable to the needs of individual subscribers is thus demonstrated.

Investigation Of Fast Interface States In Mosfets Using A Pulsed Field Effect Technique, Anthony E. Giraudo

Electrical and Computer Engineering ETDs

This thesis is the culmination of an investigation into the pulsed field effect technique. Basically, the pulsed field effect technique is a measurement of the surface conductance of a semiconductor under the influence of a transverse electric field. The pulsed field effect has been used to investigate surface states and interface states at the silicon surface. The nature of this technique allows it to be used in analyzing the metal-oxide-semiconductor field effect transistor (MOSFET). Specifically, the investigation has been to determine if the pulsed field effect technique could be used to investigate fast interface states which are located at the …

Cpacs Happenings (December 1976 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-)

Ole Miss Engineer 1976

Ole Miss Engineer

No abstract provided.

A Possible Explanation Of Concrete Pop-Outs, James H. Havens, Robert C. Deen

Kentucky Transportation Center Research Report

This report summarizes several years of research relating to damage to concrete and aggregates undergoing freezing and thawing. Basic principles involving freezing and attendant pressures are considered. Application of these principles to the evaluation of concrete was accomplished in experiments on concrete having low and high air contents.

Freeze-thaw characteristics of saturated aggregates relative to physical properties such as porosity, absorption, and bulk specific gravity were studied by submerging individual particles in pre-chilled mercury. Pressures associated with pop-outs in concrete were monitored and are presented along with accompanying theoretical considerations.

Raised-Aggregate, Lane-Delineation Stripe, Jerry G. Pigman, Kenneth R. Agent

Kentucky Transportation Center Research Report

Experimental raised-aggregate (1/2 inch (13 mm) to 1 inch (25 mm)) traffic stripes were installed on approximately 0.4 mile (644 m) of US 60 just north of the intersection with US 421 in Franklin County. Installation was during June 1974. Aggregate stripes were painted yellow and used as skip lines inside the continuous channelization stripes to indicate no crossing into the two-way, left-turn lane except for turning movements.

Observations indicated that the raised-aggregate stripes had good durability after being exposed to 2 years of wear. During dry, nighttime conditions, the paint stripes were slightly more effective than the aggregate stripes; …

Statewide Survey Of Skid Resistances Of Pavements [Dec. 1976], Rolands L. Rizenbergs, James L. Burchett, Larry A. Warren, William M. Sampson

Kentucky Transportation Center Research Report

Since 1969, when a research-type, skid-test trailer was acquired, U.S. routes were surveyed in 1970 and 1971, and the interstate and toll road systems were surveyed in 1971. The data were used for research purposes and have been reported. The interstate and toll road systems were surveyed again for research purposes in 1974. Since October 1974, surveys have been performed under a highway safety project grant. All primary and principal secondary roads, involving 4,612 miles (7425 km), were surveyed in 1975. The 1974 and 1975 surveys, data reported herein, represented 25 percent of the mileage of rural, state-maintained roads in …

Classroom Analysis Of Various Plastics, Paul D. Harrington

Graduate Research Papers

In the junior high plastics course this writer. teaches, the students display more interest in the manipulative activities of the laboratory than in the sit-down classroom activities. The results of this tend to be a once-over-lightly treatment of the technical aspects of plastics and more hands on craft type activities in the laboratory. To bring more balance to the program, an activity needs to be devised which will have more industrial relevance. Such an activity should allow the students a certain amount of freedom and still provide them with technical information and acquaint them with the properties of various plastics. …

Sensitivity Of Process Variables On Rigid Polyurethane Foaming, Bruce A. Pugsley

Theses and Dissertations

Inadequate understanding and/or control of the polyurethane rigid foam process normally requires five to ten percent overpack of cavities to obtain correct fill and foam characteristics. This practice of overpacking has resulted in excessive waste and cost.

Evaluation Of Zinc Sulfate Electrolytes By Cyclic Voltammetry And Electron Microscopy, Bruce A. Lamping, Thomas J. O'Keefe

Materials Science and Engineering Faculty Research & Creative Works

A cyclic voltammetric technique has been developed for approximating the quantities of active chemical species present in zinc sulfate electrolytes. The experimental apparatus consisted of a Pyrex "H" cell, an aluminum cathode encased in a Teflon holder, a carbon anode and a mercurous sulfate reference electrode. Voltammograms were obtained using industrial, purified neutral leach solution (Cominco Ltd., Trail, BC) acidified to give a final concentration of 0.77 M Zn++ and 1 M H2SO4. The polarization curves were then evaluated and used as reference standards to compare with results obtained when various organic and inorganic additions were made. The deposit morphologies …

Beam Modes In Complex Lenslike Media And Resonators, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

General sets of higher-order beam modes are derived for light propagation in media having spatial variations of the gain or loss. The resulting expressions are also valid for propagation through conventional optical elements and graded transmission filters. The four basic mode sets obtained include off-axis Hermite-Gaussian and Laguerre-Gaussian modes of both real and complex argument. A procedure is developed for finding the resonant modes of laser oscillators containing arbitrary complex lens elements, and the mode stability properties of lasers can be interpreted physically by means of these formulas.

Reply To “Comment On 'Resonance Raman Scattering And Collision-Induced Redistribution Scattering In I2’ ”, D. L. Rousseau, G. D. Patterson, P. F. Williams

P. F. (Paul Frazer) Williams Publications

We demonstrate that neither laser broadening nor inelastic collisional broadening plays a dominant role in the data of our recent experiments as has been suggested, and again we conclude that our results can only be explained by redistribution emission resulting from phase-changing processes.

Propagation Of Ground Vibration: A Review, Timothy G. Gutowski, Clive L. Dym

All HMC Faculty Publications and Research

A review of the current state of the art of ground vibration propagation is presented herein. First the theoretical models of vibration attenuation are reviewed and then measurement techniques are discussed. Finally, measurement and theory are combined into predictive models, whose validity is discussed.

A Numerical Solution For The Ultimate Strength Of Tubular Beam-Columns, Arnold L. Wagner

Dissertations and Theses

To provide a basis for the development of interaction curves for tubular beam-columns of annular cross section, a general purpose beam-column computer program is developed, and used to determine ultimate load capacities. The paper presents the analytical model and the computer method. The analytical results are compared with published test data as well as experimental data obtained as part of this project.

Modification Of Kentucky’S Adequacy-Rating Techniques, Charles V. Zegeer, Rolands L. Rizenbergs

Kentucky Transportation Center Research Report

The purpose of this study was to evaluate Kentucky's adequacy-rating methods and procedures and to recommend improvements. The rating procedures used by planning engineers in the highway districts were found to be reliable and consistent. Kentucky's methods were found to be superior to methods used in most states, but several changes are recommended. Additions include credits for accident analysis for urban and rural sections, traffic control devices for urban areas, and traffic safety features for bridges. Skid resistance evaluation was changed from a subjective rating to a measured value. Points assigned to the various rating elements have been revised, and …

Pulse Evolution In Co₂ Lasers, Lee W. Casperson, M. J. Herbst, John J. Turechek

Electrical and Computer Engineering Faculty Publications and Presentations

Explicit formulas are examined for the development of optical pulses in gain‐switched or Q‐switched laser oscillators and for the distortion of such pulses in succeeding stages of laser amplification. The results are compared to data obtained with a TEA CO₂ oscillator‐amplifier system.

Individualized Instructional Units For Estimating In The Construction Field, Robert P. Rosendahl

Graduate Research Papers

The purpose of this study was to investigate the development, production, and use of individualized instructional units for construction estimating for the purpose of incorporating a section on estimating into the construction technology course of the industrial arts program. These units should be equally valuable in seminars, workshops, and courses set up for construction personnel, engineers, retail lumber dealers, and university or technical students.