Engineering Commons^™

Traffic Speed Report No. 103 : Interim Report, James Robert Mekemson, George K. Stafford

JTRP Technical Reports

No abstract provided.

Application Of The Utcs-1 Network Simulation Model To Select Optimal Signal Timings In A Multi-Linear Street System : Interim Report, Raymond N. Carini

JTRP Technical Reports

No abstract provided.

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

JTRP Technical Reports

No abstract provided.

Traffic Speed Report No. 101 : Interim Report, Graham S. Toft, 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.

Stress-Deformation And Strength Characteristics Of A Compacted Shale : Interim Report, Russell Aubrey Abeyesekera

JTRP Technical Reports

No abstract provided.

Computerized Slope Stability Analysis For Indiana Highways, Vol. I, Eva Boutrup

JTRP Technical Reports

No abstract provided.

Computerized Slope Stability Analysis For Indiana Highways, Vol. Ii: Stabl2 Program, Eva Boutrup

JTRP Technical Reports

No abstract provided.

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 …

Threshold Characteristics Of Mirrorless Lasers, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

Detailed analytical expressions are developed for the output power and spectral characteristics of high‐gain mirrorless laser amplifiers. With regard to intensity variations and spectral narrowing, such lasers are similar in behavior to conventional laser oscillators. A threshold transition region is apparent as saturation sets in, and spectral rebroadening occurs in inhomogeneously broadened laser systems. These solutions take full account of saturation by both the right and left propagating radiation, and the results agree with experiments that have been reported.

Intraframe Sequential Picture Coding, John A. Stuller, Bernd Kurz

Electrical and Computer Engineering Faculty Research & Creative Works

This Paper Generalizes Time-Discrete Autoregressive Source Coding Results of Rate-Distortion Theory to Two Dimensions. a 2-D Discrete Autoregressive Source is Defined and Shown to Produce a 2-D Wide-Sense Markovian Field. the Rate Distortion Function of the Source is Then Obtained under Assumption of Gaussian Field Statistics and a Squared Error Fidelity Criterion. a Procedure for Generating an Ensemble of 2-D Codewords Whose Statistics Satisfy the Variational Equations for R(D) is Given. These 2-D Codewords Are, by Space-Time Mappings, 1-D Tree Codes, and It is Noted that a Tree Coding Theorem of Jelinek, Berger, Davis and Hellman Applies. the Problem of …

The Attenuation Of Acoustic-Gravity Waves In A Slightly Dissipative Atmosphere, R. (Richard) E. Dubroff, K. C. Yeh, C. H. Liu

Electrical and Computer Engineering Faculty Research & Creative Works

This Paper is Concerned with Computation of the Attenuation Coefficient of Internal Acoustic-Gravity Waves in a Slightly Dissipative Horizontally Stratified Atmosphere. Two Models Are Generally Used in Deriving This Attenuation Coefficient. in One Model, the Nonlinear Hydrodynamic Equations Are Analyzed by using a Stokes Expansion and the WKB Solutions to the Linearized Perturbations Are Sought by using the Coupled Mode Formulation. in the Second Model, the Attenuation is Viewed as the Dissipation of Pseudo energy. We Show in This Paper that in a Slightly Dissipative Atmosphere, These Two Models Give Identical Results as Far as Computation of the Attenuation Coefficient …

Using An Inverter To Measure Magnetic Fields, Stanley V. Marshall

Electrical and Computer Engineering Faculty Research & Creative Works

A toroidal core may be used with an inverter circuit to measure magnetic fields in the 0.8 to 80,000 A/m (.01 to 1.0 KOe) range. The sensor core may be the inverter transformer itself or may be coupled to a Non saturating inverter transformer. The sensor is most sensitive to fields parallel to the plane of the sensor and the sensitivity is greatest for a core biased to near saturation. An empirical expression for the demagnetization factor is used in calculating the ambient field required to saturate the sensor core, making it possible to calculate the range of fields for …

Probability Of Anomaly Expressions For Random Waveform Registration, George L. Bair, Gordon E. Carlson

Electrical and Computer Engineering Faculty Research & Creative Works

Registration by integral-square error correlation of one-dimensional Discrete Time waveforms which are treated as random processes with specified autocorrelation functions is considered. An important design parameter for this class of problems is the probability of anomaly (a false dip in the correlation function) because it gives an indication of system immunity to gross registration errors. Explicit expressions for this parameter are not possible, so bounds and approximations must be derived. Two upper bounds and an approximation for the probability of anomaly are derived here. The use of these expressions is illustrated by an example. The relative utility of these performance …

Multiple High Voltage Output Dc-To-Dc Power Converter, Don Cronin, Bertrand F. Farber, Hartmut K. Gehm, Daniel S. Goldin

Mechanical and Aerospace Engineering Faculty Research & Creative Works

Disclosed is a multiple output DC-to-DC converter. The DC input power is filtered and passed through a chopper preregulator. The chopper output is then passed through a current source inverter controlled by a squarewave generator. The resultant AC is passed through the primary winding of a transformer, with high voltages induced in a plurality of secondary windings. The high voltage secondary outputs are each solid-state rectified for passage to individual output loads. Multiple feedback loops control the operation of the chopper preregulator, one being responsive to the current through the primary winding and another responsive to the DC voltage level …

Surface Dynamics Profilometer And Quarter-Car Simulator: Description, Evaluation, And Adaptation, James L. Burchett, Rolands L. Rizenbergs, Thomas A. Moore

Kentucky Transportation Center Research Report

A Surface Dynamics Profilometer was acquired in December 1968. The SD Profilometer was designed to rapidly and accurately measure the profile of the surface over which it is driven. A Quarter-Car Simulator was obtained in 1970. The simulator, a special purpose analog computer, was designed to process road profiles measured with the SD Profilometer. This processing involves analog simulation of a simplified vehicle. Factors and variables associated with the devices and calibration and test procedures were investigated and standardized. The Automatic Roughness-Measuring System using an automobile (Kentucky interim standard method of test for roughness) was correlated with the SD Profllometer …

Energy Conservation In Ammonia Production, Yash P. Gupta, Donald B. Wilson

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

The Federal Energy Administration currently is considering energy conservation goals for the industry. This paper presents methods for chemical/petroleum industry to conserve energy. Ammonia Production is used as an example.

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 …

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 …

Signal Processing For The Multistate Myoelectric Channel, Philip A. Parker, John A. Stuller, R. N. Scott

Electrical and Computer Engineering Faculty Research & Creative Works

In the Multistate Myoelectric Channel, a Single Myoelectric Signal Source is Used to Control a Multifunction Powered Prosthesis. the Selection of a Prosthesis Auction Requires a Receiver to Process the Myoelectric Signal, Contaminated with Noise, and to Decide on the Basis of the Received Signal Which Function is Desired. Thus, the Channel Dearly Presents a Problem of Choice of Receiver and of Decision Strategy. Previous Solutions to This Problem Have Been Basically Empirical. in This Paper We Seek the Optimum Receiver Where Optimum is in the Minimum Probability of Error Sense. First a Model is Developed for the Bipolar Myoelectric …

Improving Qpsk Transmission In Band-Limited Channels With Interchannel Interference Through Equalization, S. H.R. Raghavan, Rodger E. Ziemer

Electrical and Computer Engineering Faculty Research & Creative Works

This paper describes the use of equalization in conjunction with channel filtering to improve QPSK transmission subject to both InterSymbol interference (ISI) and interchange interference (ICI). Performance bounds are computed using the nonclassical Gauss-quadrature rule (GQR) method. The signal-to-noise ratio (SNR) gain due to linear equalization over Non equalization is thereby obtained and presented. The performance of a linear equalizer thus obtained is compared with the Viterbi algorithm sequence estimator (VASE). In the absence of bounds for the VASE receiver under the channel conditions considered, simulation results are used to make the comparison. With a possible difference in the accuracies …

Mixed Convection Across A Horizontal Cylinder With Uniform Surface Heat Flux, A. Mucoglu, T. S. Chen

Mechanical and Aerospace Engineering Faculty Research & Creative Works

No abstract provided.

Optimal Cantilever Dynamic Vibration Absorbers, R. G. Jacquot, J. Earl Foster

Mechanical and Aerospace Engineering Faculty Research & Creative Works

This work considers the use of a double-ended cantilever beam as a distributed parameter dynamic vibration absorber applied to a single-degree-of-freedom system in the presence of sinusoidal forces. The problem is analyzed exactly and by an energy approach using a single mode approximation for the cantilever beam. The results for both techniques compare favorably and damping is introduced in the form of a complex beam modulus. Optimal tuning and optimal damping parameters are found for a given ratio of absorber mass to main mass. © 1977 by ASME.

Studies Of Vibrational Surface Modes In Ionic Crystals. I. Detailed Shell-Model Studies For The Unrelaxed (001) Face Of Seven Crystals Having The Rocksalt Structure, T. S. Chen, F. W. De Wette, G. P. Alldredge

Mechanical and Aerospace Engineering Faculty Research & Creative Works

We present a comprehensive, unified account of the lattice dynamics of unrelaxed (001) faces of seven crystals having the rock salt structure, three of which have an absolute gap between the acoustical and optical bulk bands (RbF, RbCl, and NaI) and four of which have overlap between these bulk bands (NaF, NaCl, LiF, and MgO). The results are obtained from calculations of the normal modes of a thin crystal film in which the ionic interactions are described by the rigid-shell model. An outline of the formulation of the shell model for the film is given, and the rapid convergence of …

A Model For Evaluating The Effect Of Energy Reductions On Industrial Production Facilities., Eugene Dale Manning

Masters Theses

"The Energy/Production Simulation Model (EPSM) was developed to determine the impact that energy reductions have on industrial production facilities. The total energy requirements for manufacturing activities are analyzed for their effects on important production, ii which involves accounting for energy shortages as the raw material flows through all manufacturing stages to finished product. The computer algorithm presented herein involves a feedback analysis from the viewpoint of the physical units of the plant or facility in question, and is designed to aid industrial managers in designing effective energy management programs"-- Abstract, p. ii

A Fluid Control System For The University Of Missouri--Rolla Nuclear Reactor, Billy Roger Mcpherson

Masters Theses

"Solid control rods and their movement through a reactor core present problems inherent in any moving machinery. The problems of binding, wear, and noise have to be dealt with in the usage of a solid control rod system. Therefore, an alternate system that eliminates or minimizes these problems would lower maintenance costs, extend the lifetime of the control system, and produce safer operating conditions.

This thesis presents a control system that has no moving parts inside the reactor core. The system is based upon a neutron-absorbing fluid containe��d in hollow tubes in the reactor core. The fluid level is operated …

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.