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1993

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Articles 241 - 270 of 1343

Full-Text Articles in Engineering

The Effect Of Texture And Microstructure On Equibiaxial Fracture In Gallium Embrittled Aluminum Sheet, Michael Daniel Grah Oct 1993

The Effect Of Texture And Microstructure On Equibiaxial Fracture In Gallium Embrittled Aluminum Sheet, Michael Daniel Grah

Open Access Dissertations

No abstract provided.


Closure To "Darcy-Weisbach Roughness Coefficients For Gravel And Cobble Surface", John E. Gilley, Eugene R. Kottwitz, Gary A. Wieman Oct 1993

Closure To "Darcy-Weisbach Roughness Coefficients For Gravel And Cobble Surface", John E. Gilley, Eugene R. Kottwitz, Gary A. Wieman

Department of Agricultural and Biological Systems Engineering: Faculty Publications

The writers appreciate the interest expressed by the discussers in this manuscript, and are pleased to have the opportunity to further discuss this material. The discussion states that the writers have generally examined a condition already investigated in other previous studies. Reynolds number values and roughness element size for the articles referenced by the discussers are shown in Table 5. Since flow rate and Reynolds number values were not given by Ferro and Giordano (1991), data from this study are not included in Table 5.
It can be seen from Table 5 that the roughness element sizes examined by Bathurst …


Fluttering Fountains: Simplified Models, Lee W. Casperson Oct 1993

Fluttering Fountains: Simplified Models, Lee W. Casperson

Electrical and Computer Engineering Faculty Publications and Presentations

Fluttering oscillations are sometimes observed in the falling sheets of water associated with dams and waterfall fountains, and a theoretical simulation of this phenomenon was recently reported. In this study approximate analytical solutions of the previous model are described and compared with the experimental and theoretical observations.


Process For Removing Sulfur And Producing Enhanced Quality And Environmentally Acceptable Products For Energy Production From Coal, John M. Stencel, Francis J. Derbyshire Sep 1993

Process For Removing Sulfur And Producing Enhanced Quality And Environmentally Acceptable Products For Energy Production From Coal, John M. Stencel, Francis J. Derbyshire

Center for Applied Energy Research Faculty Patents

A process for producing enhanced quality adsorbent carbons and environmentally acceptable materials for energy production from coal includes an initial step of physically cleaning the coal to remove organic sulfur and mineral tailings. Next, a coal slurry of feedstock and water is prepared. Phosphoric acid is then mixed into the water of the coal slurry to provide by volume 15-85% and more preferably 50-85% phosphoric acid. The slurry is then heated and held in a temperature range between 85° and 230° C. for a period of at least five minutes to allow the phosphoric acid to penetrate deeply into the …


Gyroless Line-Of-Sight Stabilization For Pointing And Tracking Systems, Marcelo C. Aigrain Sep 1993

Gyroless Line-Of-Sight Stabilization For Pointing And Tracking Systems, Marcelo C. Aigrain

Department of Electrical and Computer Engineering: Faculty Publications

A new platform stabilization approach is described where miature, low-cost, linear accelerometers are used (instead of gyroscopes) for line-of-sight (LOS) stabilization. This is accomplished by placing the accelerometers at strategic locations and combining their outputs so that angular motion is determined from linear acceleration measurements. The control system uses the sensed angular accelerations to generate movement commands for the gimbal servomotors in the stabilization platform. This counterrotates the imaging device to stabilize its LOS. The use of accelerometers allows the servo system to operate in an acceleration control mode, which is more desirable than position or velocity control modes, typical …


Appendix: List Of Participants [1993], Kentucky Transportation Center Sep 1993

Appendix: List Of Participants [1993], Kentucky Transportation Center

Kentucky's Annual Forum on Transportation

No abstract provided.


Awards Luncheon, Don C. Kelly Sep 1993

Awards Luncheon, Don C. Kelly

Kentucky's Annual Forum on Transportation

No abstract provided.


Congestion Management At The Local Level, Leon Walden Sep 1993

Congestion Management At The Local Level, Leon Walden

Kentucky's Annual Forum on Transportation

No abstract provided.


State Management Systems Status, J. M. Yowell Sep 1993

State Management Systems Status, J. M. Yowell

Kentucky's Annual Forum on Transportation

No abstract provided.


Translating Vision Into Action Through Quality Management, Rodger B. Lewis Sep 1993

Translating Vision Into Action Through Quality Management, Rodger B. Lewis

Kentucky's Annual Forum on Transportation

No abstract provided.


Partners In Intermodalism, Sue Jeffers Sep 1993

Partners In Intermodalism, Sue Jeffers

Kentucky's Annual Forum on Transportation

No abstract provided.


Privatization Of Transportation Functions, Merl M. Hackbart Sep 1993

Privatization Of Transportation Functions, Merl M. Hackbart

Kentucky's Annual Forum on Transportation

No abstract provided.


Partners In Technology, David O. Cox Sep 1993

Partners In Technology, David O. Cox

Kentucky's Annual Forum on Transportation

No abstract provided.


Partners In Intermodalism, David B. Clarke Sep 1993

Partners In Intermodalism, David B. Clarke

Kentucky's Annual Forum on Transportation

No abstract provided.


Partners In Intermodalism, Kirk Harralson Sep 1993

Partners In Intermodalism, Kirk Harralson

Kentucky's Annual Forum on Transportation

No abstract provided.


Highway Economic Development Enabling Plan For Kentucky, Jack Fish Sep 1993

Highway Economic Development Enabling Plan For Kentucky, Jack Fish

Kentucky's Annual Forum on Transportation

No abstract provided.


Partners In Intermodalism, Michael L. Ruehling Sep 1993

Partners In Intermodalism, Michael L. Ruehling

Kentucky's Annual Forum on Transportation

No abstract provided.


The Road Map To Financing: Financial Implications Of Istea, Paul E. Toussaint Sep 1993

The Road Map To Financing: Financial Implications Of Istea, Paul E. Toussaint

Kentucky's Annual Forum on Transportation

No abstract provided.


Partners In Technology, Eddie Bruce Sep 1993

Partners In Technology, Eddie Bruce

Kentucky's Annual Forum on Transportation

No abstract provided.


Luncheon Presentation, Douglas A. Bruce Sep 1993

Luncheon Presentation, Douglas A. Bruce

Kentucky's Annual Forum on Transportation

No abstract provided.


Partners In Intermodalism, Jane F. Garvey Sep 1993

Partners In Intermodalism, Jane F. Garvey

Kentucky's Annual Forum on Transportation

No abstract provided.


Partners In Technology, John A. Clements Sep 1993

Partners In Technology, John A. Clements

Kentucky's Annual Forum on Transportation

No abstract provided.


Partners In Finance, William M. Spreitzer Sep 1993

Partners In Finance, William M. Spreitzer

Kentucky's Annual Forum on Transportation

No abstract provided.


Who Are The Customers?, Francis B. Francois Sep 1993

Who Are The Customers?, Francis B. Francois

Kentucky's Annual Forum on Transportation

No abstract provided.


Kentucky Transportation Hall Of Fame [1993], Kentucky Transportation Center Sep 1993

Kentucky Transportation Hall Of Fame [1993], Kentucky Transportation Center

Kentucky's Annual Forum on Transportation

No abstract provided.


Review Of Planning Distribution Model (Pdm) Status And Application Possibilities For The Egyptian Irigation System, Robert W. Hill, Richard C. Peralta, Gary P. Merkley Sep 1993

Review Of Planning Distribution Model (Pdm) Status And Application Possibilities For The Egyptian Irigation System, Robert W. Hill, Richard C. Peralta, Gary P. Merkley

Civil and Environmental Engineering Faculty Publications

The comprehensive water management Planning Distribution Model, or PDM, was developed by the Biological and Irrigation Engineering Department, Utah State University (USU), under contract with the United States Bureau of Reclamation (USBR). Most of the work was carried out in the Planning Sector, Ministry of Public Works and Water Resources (MPWWR) , in Cairo, under the Planning Studies and Models Component of the USAID funded Irrigation Management Systems Project.


A Study Of Spiking And Relaxation Oscillations In Nd:Yag Laser Using Measured Laser Parameters, Ramesh K. Shori Sep 1993

A Study Of Spiking And Relaxation Oscillations In Nd:Yag Laser Using Measured Laser Parameters, Ramesh K. Shori

Dissertations and Theses

It was shown analytically and experimentally that when the cavity losses are perturbed, the output intensity experiences an amplitude modulation or becomes a regular train of spikes, with the frequency depending on both the frequency of perturbation as well as pump power. Coupled nonlinear rate equations including the cavity perturbation term, are solved numerically by a Runga-Kutta method using experimentally-measured parameter values for Nd: Y AG laser. A continuously pumped Nd: Y AG laser was used to verify this theory.


Water Quality Modeling Of The Tualitin River, Christopher John Berger Sep 1993

Water Quality Modeling Of The Tualitin River, Christopher John Berger

Dissertations and Theses

Water quality problems related to excessive algal growth, high nutrient loading, and low flows have been occurring along Oregon's Tualatin River. The Tualatin River is 86 miles long and has a drainage basin of 711 square miles. The drainage basin incorporates forest, agricultural, and urban areas. Located in the Portland metropolitan area, these problems have been acerbated by the effects of urban growth. To help analyze pollution control alternatives, a river model study, funded by the Oregon Department of Environmental Quality (DEQ}, was undertaken. An in-stream model of hydraulics and water quality was developed. The Corps of Engineer's CE-QUAL-W2 model, …


Modeling Of Flow And Water Quality In Henry Hagg Lake Near Forest Grove, Oregon, Michael T. Knutson Sep 1993

Modeling Of Flow And Water Quality In Henry Hagg Lake Near Forest Grove, Oregon, Michael T. Knutson

Dissertations and Theses

Increased population growth in Washington County, Oregon, has helped cause the water quality of the Tualatin River to decline. Henry Hagg Lake is a storage reservoir which was built to augment summer low flows in the Tualatin River. Hagg Lake also supplies the Tualatin River Basin with both irrigation and municipal water in the summer. Using the U.S. Army Corps of Engineer's model CE-QUAL-W2 (a two-dimensional hydrodynamic and water quality model) , a model of Henry Hagg Lake was created. The model was calibrated using water quality and hydraulic data for 1990 at the Hagg Lake outflow in Scoggins Creek. …


Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 9, Number 7, September 1993, College Of Engineering And Computer Science, Wright State University Sep 1993

Wright State University College Of Engineering And Computer Science Bits And Pcs Newsletter, Volume 9, Number 7, September 1993, College Of Engineering And Computer Science, Wright State University

BITs and PCs Newsletter

A ten page newsletter created by the Wright State University College of Engineering and Computer Science that addresses the current affairs of the college.