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Articles 187471 - 187500 of 196718
Full-Text Articles in Engineering
Test 1230: Allis-Chalmers 5040 Diesel, Nebraska Tractor Test Lab
Test 1230: Allis-Chalmers 5040 Diesel, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF THE TEST PROCEDURE General Tractors are tested at the University of Nebraska according to the Agricultural Tractor Test Code approved by the American Society of Agricultural Engineers and the Society of Automotive Engineers or official Nebraska test procedure. The manufacturer selects the tractor to be tested and certifies that it is a stock model. Each tractor is equipped with the common power consuming accessories such as power steering, power lift pump, generator, etc., if available. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operating station. An official representative of …
A Computer Simulation Of A Weapons Fire Simulator Modeled By Sceptre As An Optical Communication Channel, John James Cormack
A Computer Simulation Of A Weapons Fire Simulator Modeled By Sceptre As An Optical Communication Channel, John James Cormack
Retrospective Theses and Dissertations
This paper presents a method of simulating various noise sources in a Weapons Fire Simulator System which has been modeled as an Optical Communication Channel. This Weapons Fire Simulator System is composed of laser transmitters mounted on weapons that fire blank cartridges, and laser receivers mounted on targets. The laser transmitter sends out 'kill' beam pulses to the target whenever blank cartridges are fired. Detection of these pulses at the target signifies a 'hit'. The entire system along with the optical communication channel is simulated in a general purpose computer program called SCEPTRE. This analysis package is an efficient means …
Analytical And Experimental Investigation Of Thermosyphon Solar Hot Water Systems, William E. Clark
Analytical And Experimental Investigation Of Thermosyphon Solar Hot Water Systems, William E. Clark
Retrospective Theses and Dissertations
A computer simulation of a thermosyphon system allowing load drawoff and non-ideal weather conditions has been developed. The model is restricted to the more common single cover, flat plate collector system. Using an analysis based on the present literature, this model calculates the energy absorbed by the collector, the temperature distribution through the system, and the corresponding flow rate. Experimental data for a non-ideal day is compared to the computer simulation. Results of this comparison indicate that the desired parameters, flow rate, collector inlet and outlet temperatures, and the mean tank temperature can be predicted by this model to within …
Torque-Speed Linearization Of A D.C. Servo System, Nicholas A. Mantello
Torque-Speed Linearization Of A D.C. Servo System, Nicholas A. Mantello
Retrospective Theses and Dissertations
In early 1973 Professor Fred O. Simons Jr., of Florida Technological University, suggested the topic for this research report. During control engineering discussions, it was proposed that a D.C. Shunt Motor could be constrained to perform in an idealized sense for the static case. The purpose of this report is to provide a reasonably comprehensive examination of a control which linearizes the torque-speed relationship of a dc servo system. The fundamental goal is to determine a control which linearizes the torque-speed output relation of a system, in which a dc shunt motor is under basic armature control. Consequently, the emphasis …
A Diffraction Model For Prediction Of Radar Signal Attenuation By A Rocket Exhaust Plume, Douglas Harrison Sphar
A Diffraction Model For Prediction Of Radar Signal Attenuation By A Rocket Exhaust Plume, Douglas Harrison Sphar
Retrospective Theses and Dissertations
This report documents the development of a method of estimating the signal attenuation induced by a rocket exhaust plume. The method is applicable to the early system design phase of high energy solid propellant rockets that produce highly ionized exhaust plumes. The method is based on the premise that when a plume is highly ionized, observed signal levels can be explained by assuming the signal propagates around the plume. A simple diffraction at a straight edge model is developed and compared to measured data. The report also provides an overview of exhaust plume electromagnetics and surveys prediction techniques.
A Comparative Study Of Forecasting Techniques For The Us Air Force Medical Material Management System, Phillip John Van Ess
A Comparative Study Of Forecasting Techniques For The Us Air Force Medical Material Management System, Phillip John Van Ess
Retrospective Theses and Dissertations
A computer simulation experiment was conducted to evaluate and compare five individual forecasting models across nine different demand patterns. The models were based on the Medical Materiel Management System used by the US Air Force hospitals. Results indicated the best model varied depending on the demand pattern, the safety stock level, the noise level of the demand pattern, and the measure of forecast error. Across all demand patterns, exponential smoothing and 12-month moving average were best for the short term forecast used by the system, regardless of noise level in the demand patterns. Analysis of models within a single demand …
Thermal Control Of An Electronic Enclosure Utilizing A Vapor Chamber, Michael L. Dougherty
Thermal Control Of An Electronic Enclosure Utilizing A Vapor Chamber, Michael L. Dougherty
Retrospective Theses and Dissertations
This thesis addresses the problem of extracting heat from sealed electronic enclosures. Typical industry practice is to use various air-to-air and air-to-liquid heat exchangers. These techniques are known to require costly custom designs. This thesis points out how one can apply heat pipe technology in the form of a vapor chamber to solve this type of problem. The details on the design and testing of two prototype vapor chambers are cited. Included in the text are typical industrial applications that require sealed enclosures to protect their associated electronic control hardware. Also mentioned is some historical background on heat pipes.
Sewer System Design For Camp Challenge And Determination Of Per Capita Wastewater Flows From Vacation Facilities, William C. Goucher
Sewer System Design For Camp Challenge And Determination Of Per Capita Wastewater Flows From Vacation Facilities, William C. Goucher
Retrospective Theses and Dissertations
A sewer system was designed for Camp Challenge of the Florida Easter Seal Society, in Mount Plymouth, Florida, of polyvinyl chloride piping. Invert elevations were tabulized and necessary fittings determined for the system. Cost estimates were also included. The sewers were designed on a per fixture basis so as not to overdesign using per capita flow rates. A literature and records search was conducted to obtain design and actual wastewater flow quantities in gallons per capita per day (gpcd). Actual flows determined from 4 camps and 11 travel trailer parks gave average values of 39 and 33 gpcd, respectively, and …
An Industrial Wastewater Treatment Review For The Textile And Pulp And Paper Industries Of Srilanka, Kolonne A. Wijeratne
An Industrial Wastewater Treatment Review For The Textile And Pulp And Paper Industries Of Srilanka, Kolonne A. Wijeratne
Retrospective Theses and Dissertations
A legislative authority empowered to protect Srilanka's environment, operating similarly to the Environmental Protection Agency of the U.S., is needed, along with wastewater treatment. Wastewater parameters of importance in treatment are BOD, COD, total suspended solids, settleable solids, pH, colour, turbidity, ammonia or nitrate nitrogen, heavy metals, sulfides, phosphates, and phenols. Methods of industrial waste treatment vary depending on the climatic conditions, the industry, raw materials, and process adopted. Textile and pulp and paper industries exist in Srilanka and have very high pollution potential. Methods of treatment to finally generate reasonably good quality effluent are available. Processing of effluents from …
Application Of A Hydrologic Model To The Planning And Design Of Storm Drainage Systems For Urban Areas, George B. Shih, Eugene K. Israelsen, Robert N. Parnell, Jr., J. Paul Riley
Application Of A Hydrologic Model To The Planning And Design Of Storm Drainage Systems For Urban Areas, George B. Shih, Eugene K. Israelsen, Robert N. Parnell, Jr., J. Paul Riley
Reports
A generally applicable hybrid computer program is developed to simulate runoff from urban watersheds, and is applied to represent the outflow hydrographs of three urban watersheds located within Salt Lake County, Utah. The gaged outflow of the watersheds provided a means for comparing the observed and the simulated final outflow hydrographs. Each of the three watersheds was subdivided into spatial units or subzones, and the outflow hydrographs for each subzone were obtained by abstracting interceptions, infiltration, and depression storage from the rainfall hyetograph of each subzone. The resulting hydrograph outflow of each subzone was routed to the Jordan River, the …
The Effect Of Commercial Vehicles On Delay At Intersections : Technical Paper, Thomas H. Yurysta, Harold L. Michael
The Effect Of Commercial Vehicles On Delay At Intersections : Technical Paper, Thomas H. Yurysta, Harold L. Michael
JTRP Technical Reports
No abstract provided.
A Comprehensive Pavement Evaluation System: Application To Crcp : Technical Paper, Eldon J. Yoder, Asif Faiz, D. G. Shurig
A Comprehensive Pavement Evaluation System: Application To Crcp : Technical Paper, Eldon J. Yoder, Asif Faiz, D. G. Shurig
JTRP Technical Reports
No abstract provided.
Factors Influencing Nitrogen Fixation By Several Woody Shrubs And Trees : Interim Report, Robert E. Mcniel
Factors Influencing Nitrogen Fixation By Several Woody Shrubs And Trees : Interim Report, Robert E. Mcniel
JTRP Technical Reports
No abstract provided.
Traffic Speed Report No. 95 : Progress Report, Ahmed Atef Gadallah, George K. Stafford
Traffic Speed Report No. 95 : Progress Report, Ahmed Atef Gadallah, George K. Stafford
JTRP Technical Reports
No abstract provided.
The Effects Of Bottom Ash Upon Bituminous Sand Mixtures, Thomas Scott Shuler
The Effects Of Bottom Ash Upon Bituminous Sand Mixtures, Thomas Scott Shuler
JTRP Technical Reports
No abstract provided.
Design And Construction Of Several Maintenance Techniques For Continuously Reinforced Concrete Pavements : Interim Report, Robert H. Florence
Design And Construction Of Several Maintenance Techniques For Continuously Reinforced Concrete Pavements : Interim Report, Robert H. Florence
JTRP Technical Reports
No abstract provided.
Characteristics Of Heavy Truck Accidents, Ahmed Essam Radwan
Characteristics Of Heavy Truck Accidents, Ahmed Essam Radwan
JTRP Technical Reports
No abstract provided.
Expansive (Self-Stressing) Cements In Reinforced Concrete: Interim Report, Hanume Gowda
Expansive (Self-Stressing) Cements In Reinforced Concrete: Interim Report, Hanume Gowda
JTRP Technical Reports
No abstract provided.
An Examination Of The Variability Resulting From Soil Compaction : Interim Report, Martin F. Essigman
An Examination Of The Variability Resulting From Soil Compaction : Interim Report, Martin F. Essigman
JTRP Technical Reports
No abstract provided.
A 5-Year Evaluation Of Highway Mowing Practices: Summary And Recommendations : Interim Report, D. James Morré, Jane Eberle
A 5-Year Evaluation Of Highway Mowing Practices: Summary And Recommendations : Interim Report, D. James Morré, Jane Eberle
JTRP Technical Reports
No abstract provided.
A Methodology For Evaluating The Impact Of Railroad Abandonment On Rural Highways, Lynn Omega Purnell
A Methodology For Evaluating The Impact Of Railroad Abandonment On Rural Highways, Lynn Omega Purnell
JTRP Technical Reports
No abstract provided.
A Study Of The Design Parameters For Asphalt Emulsion Treated Mixtures : Interim Report, Ahmed Atef Gadallah
A Study Of The Design Parameters For Asphalt Emulsion Treated Mixtures : Interim Report, Ahmed Atef Gadallah
JTRP Technical Reports
No abstract provided.
Chemical Control Of Brush And Environmental Safety Of Roadside Vegetation Management Chemicals : Interim Report, D. James Morré
Chemical Control Of Brush And Environmental Safety Of Roadside Vegetation Management Chemicals : Interim Report, D. James Morré
JTRP Technical Reports
No abstract provided.
Morphology Of The Paste-Aggregate Interface, Volume 1, B. D. Barnes
Morphology Of The Paste-Aggregate Interface, Volume 1, B. D. Barnes
JTRP Technical Reports
No abstract provided.
Effect Of Film Thickness, Voids, And Permeability On Asphalt Hardening In Asphalt Mixtures, Arun Kumar
Effect Of Film Thickness, Voids, And Permeability On Asphalt Hardening In Asphalt Mixtures, Arun Kumar
JTRP Technical Reports
No abstract provided.
Right Turn On Red: Utilization And Impact, Michael S. Mamlouk
Right Turn On Red: Utilization And Impact, Michael S. Mamlouk
JTRP Technical Reports
No abstract provided.
Legal And Organizational Tools And Techniques For Implementing Land Use Plans, T. William Patterson
Legal And Organizational Tools And Techniques For Implementing Land Use Plans, T. William Patterson
JTRP Technical Reports
No abstract provided.
Analysis Of Changes In Driver Reaction To Improved Warning Devices At A Rural Grade Crossing : Technical Paper, Eugene Robert Russell, Harold L. Michael, Thomas Allan Butcher
Analysis Of Changes In Driver Reaction To Improved Warning Devices At A Rural Grade Crossing : Technical Paper, Eugene Robert Russell, Harold L. Michael, Thomas Allan Butcher
JTRP Technical Reports
No abstract provided.
Direct Tension Test Results For Some Asphalt Concretes : Technical Paper, Raymond Doran Pavlovich, William Harner Goetz
Direct Tension Test Results For Some Asphalt Concretes : Technical Paper, Raymond Doran Pavlovich, William Harner Goetz
JTRP Technical Reports
No abstract provided.
Blow-Ups On Resurfaced Concrete Pavements, David Lee Gress
Blow-Ups On Resurfaced Concrete Pavements, David Lee Gress
JTRP Technical Reports
No abstract provided.