Engineering Commons^™

Evaluation Of Micro Irrigation Systems, Charles M. Burt, Robert E. Walker, Stuart W. Styles

BioResource and Agricultural Engineering

No abstract provided.

Applications Of Optical Emission Spectroscopy To Semiconductor Processing, Richard N. Savage, John G. Shabushnig, Paul R. Demko

Materials Engineering

Optical emission spectroscopy (OES) has proven to be a valuable tool in the developmrent and production of state-of-the-art semiconductor devices. Application to the plasma etching of a variety of materials necessary for integrated circuit fabrication is discussed, with particular emphasis placed on etch endpoint analysis. The utility of OES techniques in monitoring photolithographic processes is also presented.

Response Of Lithographic Mask Structures To Repetitively Pulsed X-Rays: Thermal Stress Analysis, A. Ballantyne, H.A. Hyman, Clive L. Dym, R.C. Southworth

All HMC Faculty Publications and Research

This paper examines the effects of thermal loading and time history upon the thermal stresses developed in lithographic mask structures as would be expected under irradiation by intense soft x rays. The objective of this work was to examine the phenomenology of the interaction and to evaluate the limits placed upon mask dosage. The mechanics of mask failure are examined in terms of single pulse and cumulative, or fatigue, effects. A number of prototypical mask structures are investigated, which show that the application of intense pulsed sources to x‐ray lithography does not reduce the potential utility of the techique. However, …

Response Of Lithographic Mask Structures To Repetitively Pulsed X-Rays: Dynamic Response, Clive L. Dym, A. Ballantyne

All HMC Faculty Publications and Research

This paper addresses the issue of the dynamic response of thin lithographic mask structures to thermally induced stress fields. In particular, the impact of repetitively pulsed x‐ray sources are examined: the short duration (1–100 nsec) pulses induce large step changes in mask temperatures, which can, in turn, induce a dynamic response. The impact of conductive cooling of the mask is to reduce the repetitively pulsed problem to a series of isolated nearly identical thermal impulses of duration approximately equal to the cooling time. The importance of self‐weight and prestress is examined, and an analysis of the nonlinear dynamic response to …

Unsteady-State Spherical Flow With Storage And Skin., Jeffrey A. Joseph, Leonard Koederitz

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

This paper presents short-time interpretation methods for radial-spherical (or radial-hemispherical) flow in homogeneous and isotropic reservoirs inclusive of wellbore storage, wellbore phase redistribution, and damage skin effects. New dimensionless groups are introduced to facilitate the classic transformation from radial flow in the sphere to linear flow in the rod. Analytical expressions, type curves (in log-log and semi log format), and tabulated solutions are presented, both in terms of pressure and rate, for all flow problems considered. A new empirical equation to estimate the duration of wellbore and near-wellbore effects under spherical flow is also proposed.

Length-Thermal Stress Relations For Composite Bridges, Jack H. Emanuel, Charles M. Taylor

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

Computer-assisted analysis was used to study the relation among uniform, linear, and nonlinear stress components thermally induced in a composite bridge section for hypothetical parameters of varying span lengths, number of spans, and support conditions, as well as for actual bridges. The results were verified by conventional methods of analysis. The following was concluded for prismatic (constant) sections: (1) For constant proportionality of span lengths, each of the three thermal stress components is independent of span length; (2) variation of the proportionality of span lengths affects only the linear stress component; (3) support reactions and deflections caused by thermal loading …

Study Of Mo, Au, And Ni Implanted Molybdenum Laser Mirrors By Spectroscopic Ellipsometry, Paul G. Snyder, George H. Bu-Abbud, Jae Oh, John A. Woollam, David Poker, D. E. Aspnes, David Ingram, Peter Pronko

Department of Electrical and Computer Engineering: Faculty Publications

The implantation of 150 kev molybdenum ions into polished molybdenum laser mirrors is found to increase the complex dielectric constant in the visible spectrum. Analysis using the Bruggeman effective medium approximation demonstrates that the increase is due to surface smoothing and that the surface is made nearly atomically smooth by a fluence of 5 x 10¹⁵ /cm². Implantation of Au at 1Mev caused considerable microscopic roughening, as well as a change in the bulk optical properties. 3 MeV Ni ion implantation caused only a slight surface roughening. A thin dielectric film (probably a hydrocarbon) is found to …

Us Army Missile Intelligence Agency, Redstone Arsenal, Alabama, Robert Bolin , Depositor

United States Department of Defense Military Intelligence

This is a recruitment brochure for the Missile Intelligence Agency (MIA) providing a thumb-nail history and description of the organization. The brochure was sent to Robert Bolin in 1985 by MIA.

MISSION • TO PROVIDE WORLDWIDE, SCIENTIFIC AND TECHNICAL INTELLIGENCE (S&T) TO MEET THE REQUIREMENTS GENERATED THROUGH THE DEFENSE INTELLIGENCE AGENCY AND THE OFFICE OF THE ARMY ASSISTANT CHIEF OF STAFF FOR INTELLIGENCE. • TO DEVELOP AND DISSEMINATE FOREIGN INTELLIGENCE CONCERNING GUIDED MISSILE SYSTEMS IN RESPONSE TO INTELLIGENCE PRODUCTION REQUIREMENTS. • TO ASSESS THE S&T THREAT TO THE UNITED STATES. • TO ENHANCE WEAPONS DEVELOPMENT.

Window Treatment For Energy Conservation, Florida Solar Energy Center, Ross Mccluney

FSEC Energy Research Center®

This Energy Note gives the non-technical reader a clear look at windows - how to get the most from them in cooling, heating, ventilating and illuminating the home. Although most of the points are applicable anywhere in the country, emphasis is on summer solar heat gain experienced in buildings in Florida. Two common features of Southern building style are large window areas to let the light and breezes in, and shading devices or window films to keep the hot sunshine out. This energy note addresses design guidelines and strategies as well as shading devices and window films for existing windows.

Relative Durability Of Shale -- A Suggested Rating System, David Newton Richardson

Civil, Architectural and Environmental Engineering Faculty Research & Creative Works

The inability to predict the degradation tendencies of shale has resulted in numerous failures of projects where shale was used as a construction material. Because shale does not fit neatly into either a soil category or a rock category, the tests that are commonly used to classify soil or rock are in many instances not totally suitable for classifying shale as to its long-term behavior properties. Thus, special classification tests of shale types has become necessary. The durability or shale relates to how well it can withstand its changing environment and still retain its initial properties. Strength, expansion characteristics, and …

Equilibrium Moisture Properties Of Corn Cobs, G. M. White, Thomas C. Bridges, Samuel G. Mcneill, Douglas G. Overhults

Biosystems and Agricultural Engineering Faculty Publications

Equilibrium moisture content-equilibrium relative humidity data for broken corn cobs have been determined for both desorption and adsorption conditions for three temperature levels and five moisture levels. The Modified Henderson and Chung equilibrium moisture equations have been fitted to these data by using non-linear regression procedures to estimate equation parameters. Both equations adequately represented the experimental data. A test of varietal differences indicated no significant difference in cob desorption ERH values for three selected corn varieties.

Farm Accidents - How To Respond, Larry R. Piercy

Agricultural Engineering Extension Updates

Human nature leads us to believe that accidents always happen to the "other guy". Yet farming along with mining are the two most hazardous occupations in the Nation. If an accident struck your farm, would all family members know how to respond?

Laboratory Evaluations Of Stabilized Flue Gas Desulfurization Sludge (Scrubber Sludge) And Aggregate Mixtures, Mark Anderson, Gary W. Sharpe, David L. Allen, Herbert F. Southgate, Robert C. Deen

Kentucky Transportation Center Research Report

The Kentucky Transportation Research Program has completed a laboratory study involving the use of flue gas desulfurization sludge (scrubber sludge) for potential application as a highway subbase and/or embankment material. Scrubber sludge is a waste produet formed when fly ash (and other residue) is combined with a lime dust slurry filter cake and stabilized with quicklime (calcium oxide). Samples of stockpiled (field) sludge and dry sludge components were obtained from the Robert Reid Station (Big Rivers Electric Corporation) in Sebree, Kentuclty. Dry sludge components (fly ash, filter cake, and quicklime) were uaed to prepare sludge samples in the laboratory, allowing …

Microcomputer Based Digital Image Processing System Developed To Count And Size Laser-Generated Small Particle Images, K. D. Ahlers, D. R. Alexander

Department of Mechanical and Materials Engineering: Faculty Publications

A microcomputer-based digital image processing system has been developed to count and size laser-generated small particle images. Processing rates of 5 to 600 frames per minute were achieved by utilizing a real-time digital image processor. Particles from 7 to 700 µm in the plane of focus were counted and sized. A major emphasis in this work was to determine the basic problems and limitations involved with using a digital image processing scheme to accurately size particles. Areas that were investigated include the effect of the threshold level on measured particle size, particle boundary diffraction gray-level gradients, and geometric nonlinearities introduced …

Traffic Accident Rates In Kentucky (1983), John M. Salsman, Kenneth R. Agent

Kentucky Transportation Center Research Report

In this study, two types of accident rates were determined. First, accident rates were calculated based on 1983 data. Secondly, the 1983 data were combined with the 1980, 1981, and 1982 data to calculate long-term accident statistics to reflect a four-year average.

Comparison of 1983 to combined 1980 through 1982 rates show that the rates have remained remarkedly stable. Several methods of classifying highways were used when determining average rates. Average and critical accident rates were calculated for use in the high-accident location identification program. Also, average and critical numbers of accidents were determined.

Plasma Polymerization Investigated By The Substrate Temperature Dependence., H. Yasuda, Cheng Wang

Chemistry Faculty Research & Creative Works

In the reported experiments, plasma polymerization of tetrafluoroethylene (TFE), perfluoro-2-butyl-tetrahydrofuran (PFBTHF), ethylene, and styrene were investigated in various combinations of monomer flow rates and discharge wattages for the substrate temperature range of minus 50 to 80 degree C. The polymer deposition rates can be generally expressed by k//o equals Ae** minus **b**t, where k//o is the specific deposition rate given by k//o equals (deposition rate)/(mass flow rate of monomer), A is the preexponential factor representing the extrapolated value of k//o at zero absolute temperature, and b is the temperature-dependence coefficient. It was found that the value of b is not …

Solution To The Piecewise Linear Continuous Random Initial Value Problem For Burgers' Equation, Yin Chin Shih, X. B. Reed, Jr.

Chemical and Biochemical Engineering Faculty Research & Creative Works

A closed form solution to Burgers' equation on an infinite domain has been obtained for "random sawtooth" continuous initial conditions defined on a finite domain. The "turbulent" solution is then used to compute statistical measures such as skewness and flatness factors, energy decay rates, and the temporal evolution of velocity autocorrelations and energy spectra. © 1985 American Institute of Physics.

Bistabiity By Induced Waveguiding In Coupled Semiconductor Lasers, Daniel Heffernan, J. Mcinerney, L. Reekie, D. Bradley

Articles

Recently, McInerney, Reekie, and Bradley observed bistability in twin diode GaAs/GaAlAs injection lasers in an external cavity when both diodes were above threshold. We show that this bistability may be explained by a form of self-focusing which is produced by induced waveguiding in the wide stripe lasers. A detailed analysis is performed on a standard model of these diodes in an external cavity. We have found very good agreement between theory and experiment.

Comparison Of Contained Rock Asphalt Mat (Cram) With Conventional Asphaltic Concrete Pavements, Herbert F. Southgate, David L. Allen, Robert C. Deen

Kentucky Transportation Center Research Report

A brochure proposing the use of "Contained Rock Asphalt Mat" (CRAM) provided a comparison of stress distributions throughout a CRAM structure (Figure 1) as compared to a conventional pavement (Figure 2). Experience has indicated that stress distributions do not always present the most sensitive or appropriate analysis of a pavement structure. Distributions of strains, and more particularly "work", are better indicators of load distributions throughout a pavement structure and subsequent performance.

Evaluation Of Truck Escape Ramps, Jerry G. Pigman, Kenneth R. Agent

Kentucky Transportation Center Research Report

Out-of-control vehicles on steep grades have the potential for and frequently do result in severe accidents. There are two truck escape ramps in Kentucky, and both were constructed as a result of severe accidents and the potential for additional accidents.

One escape ramp is on the Hyden Spur (KY 118) in Leslie County. Because of geometric conditions of the highway and topographic constraints, an arrester-type escape ramp was designed with pea gravel as the arrester material. The beginning of the ramp is a 386-foot paved section on an 8-percent downgrade; followed by a gravel bed 520 feet long on a …

Nebraska Summary: S002 Deutz-Allis 7145, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Nebraska Summary: S112 S.A.M.E Laser 100vdt, Nebraska Tractor Test Lab

Nebraska Tractor Tests

ABOUT THE TEST REPORT AND USE OF THE DATA The test data contained in this report are a tabulation of the results of a series of tests. Due to the restricted format of these pages, only a limited amount of data and not all of the tractor specifications are included. The full OECD report contains usually about 30 pages of data and specifications. The test data were obtained for each tractor under similar conditions and therefore, provide a means of comparison of performance based on a limited set of reported data. EXPLANATION OF THE TEST PROCEDURES Purpose The purpose of …

Center For Computer Based Learning Policies And Procedures Manual, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

The Doctor Of Education In Computer Education An Online Program For Professional Success, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Doctor Of Arts In Information Sciences Brochure 1985, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Center For Computer-Based Learning Doctor Of Arts In Information Science And In Training And Learning, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Master Of Science In Computer-Based Learning Overview, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Doctoral Degree In Computer Education, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Doctor Of Arts In Information Science 1985-86 Catalog, Nova Southeastern University

College of Engineering and Computing Course Catalogs

No abstract provided.

Feasibility Study Of Fabricating Composite Ceramic Chamber Liners For Small Caliber Automatic Weapons, P. D. Ownby, D. V. Stewart

Materials Science and Engineering Faculty Research & Creative Works

No abstract provided.