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Articles 1 - 30 of 356
Full-Text Articles in Engineering
Development And Verification Of A Laboratory Model For Use In The Study Of A Continuous Flow Pressurized Activated Sludge Process, Wayne Frederick Nolte
Development And Verification Of A Laboratory Model For Use In The Study Of A Continuous Flow Pressurized Activated Sludge Process, Wayne Frederick Nolte
Dissertations
Investigations concerning the responses of domestic wastewater treated at elevated pressures have demonstrated an acceleration in the rate of biological assimilation of the waste material. The literature is not extensive, but presents much conflicting data. There has been a lack of a coherent approach to the investigation of pressure in wastewater treatment. This demonstrates the need for standard testing apparatus and procedures.
A bench scale pressurized activated sludge process was designed and constructed. The apparatus was tested over a broad range of conditions and was found to give reproducible results. Kinetic responses of the pressurized process are presented.
Design Of A Bit-Slice Processor, Kenneth Earl Green
Design Of A Bit-Slice Processor, Kenneth Earl Green
Electrical and Computer Engineering ETDs
A microprogrammed computer processor unit is designed using bit-slice technology. This processor executes the PDP-11/45 instruction set. The performance is evaluated and compared to other existing processors.
Use Of Thermal Storage For Load Management In A Solar-Augmented Heat Pump System, James Thomas Schmitz
Use Of Thermal Storage For Load Management In A Solar-Augmented Heat Pump System, James Thomas Schmitz
Mechanical Engineering ETDs
Electric utilities are today faced with the dilemma of satisfying increasing demands for electrical energy while their ability to build new power plants is being severely curtailed primarily due to environmental concerns. By redistributing the power demand of individual customers (and thus the utility) with respect to time, greater overall electricity consumption can be met without increasing the generating capacity of the utility. This redistribution can be accomplished using thermal energy storage at the customer’s location. For heating and cooling of buildings, thermal storage, combined with off-peak period operation of the mechanical system's major electricity consuming equipment, can lower peak …
State Estimation Using Parallel Extended Kalman Filters Of Nonlinear Measurements, Thomas Carlyle Sheives
State Estimation Using Parallel Extended Kalman Filters Of Nonlinear Measurements, Thomas Carlyle Sheives
Electrical and Computer Engineering ETDs
The extended Kalman filter applied to state estimation using nonlinear measurements has demonstrated divergence in many applications involving large initial uncertainties because of "invalid" linearizations performed by the filter on the nonlinear measurement functions. No quantitative results can be found as to how invalid these linearizations must be before divergence occurs. This report attempts to fill this void by deriving the extended Kalman filter as an approximate nonlinear least squares estimator, through the minimization of a measurement squared error function. The convergence of the extended Kalman filter is then determined by examining the squared error function and verifying the usefulness …
The Compatibility Of Mild Carbon Steel And Water In A Heat Pipe Application, David D. Kenney
The Compatibility Of Mild Carbon Steel And Water In A Heat Pipe Application, David D. Kenney
Mechanical Engineering ETDs
The phenomena that govern the performance and affect the lifetime of heat pipes are reviewed. The phenomena include the corrosion of metals by aqueous solutions, the diffusion of gases through metals, and the effects of hydrogen on metals. Heat pipes of 1015 C.D. carbon steel were fabricated and operated with a control group of 304 stainless steel heat pipes over the temperature range from 140° to 300° C. Results indicate that carbon steel/water heat pipes perform as well or better than 304 stainless steel/water heat pipes over the temperature range covered in this test.
Centers Of Polymer Research; Polymer Science And Technology In The Ddr, Otto Vogl
Centers Of Polymer Research; Polymer Science And Technology In The Ddr, Otto Vogl
Emeritus Faculty Author Gallery
No abstract provided.
Acuta Enews December 1979, Vol. 8, No.12
Acuta Enews December 1979, Vol. 8, No.12
ACUTA Newsletters
In This Issue
THE 1980'S: A TELECOMMUNICATION OPPORTUNITY
BITS & PIECES
THE USER'S CHOICE
COMMUNICATIONS SYSTEMS FOR EXTENDED CONTROL
Centers Of Polymer Research; Polymer Science And Technology In The Ddr, Otto Vogl
Centers Of Polymer Research; Polymer Science And Technology In The Ddr, Otto Vogl
Otto Vogl
No abstract provided.
Separations Of Dilute Solutions By The Smooth Deposit Approach Of The In-Situ Indirect Freezing Process, Jeng-Hung Lue
Separations Of Dilute Solutions By The Smooth Deposit Approach Of The In-Situ Indirect Freezing Process, Jeng-Hung Lue
Chemical and Biological Engineering ETDs
The main objective of the present study is to demonstrate experimentally the feasibility of applying the smooth deposit approach of the in-situ indirect freezing process to the separations of both dilute organic mixtures and aqueous mixtures. The in-situ indirect freezing process with in-situ washing and melting operations was first introduced by C. Y. Cheng and S. W. Cheng [1].
Development Of An Integrated Program Of Water Reuse In A Pulp And Paper Mill, Zafar M. Chaudhri
Development Of An Integrated Program Of Water Reuse In A Pulp And Paper Mill, Zafar M. Chaudhri
Masters Theses
No abstract provided.
Phase Equilibria For Iron-Rich Fe-Cu-C Alloys: 1500 To 950°C, Krishna Parameswaran, Kenneth Metz, Arthur E. Morris
Phase Equilibria For Iron-Rich Fe-Cu-C Alloys: 1500 To 950°C, Krishna Parameswaran, Kenneth Metz, Arthur E. Morris
Materials Science and Engineering Faculty Research & Creative Works
Isothermal sections for the iron rich corner of the Fe-Cu-C system have been constructed at 1500, 1450, 1200, 1172, 1150, 1000, and 950°C. A ternary invariant point exists at 1172°C where an iron rich liquid, a copper rich liquid, austenite, and graphite coexist. The iron rich liquid contains 3.7 wt pct Cu and 4.0 wt pct C. The austenite contains 7.3 pct Cu and 1.6 pct C. The copper rich liquid contains 2.4 pct Fe, and apparently very little carbon. The diagrams are used to explain the phenomena of "inverse segregation" that occurs during the solidification of iron rich Fe-Cu-C …
An Experimental Study Of The Reactions Of Excited Neon Atoms In Pure Afterglow Plasmas Using Resonance Absorption Spectrometry, R. A. Sierra, J. Beverley Clark, A. J. Cunningham
An Experimental Study Of The Reactions Of Excited Neon Atoms In Pure Afterglow Plasmas Using Resonance Absorption Spectrometry, R. A. Sierra, J. Beverley Clark, A. J. Cunningham
Materials Science and Engineering Faculty Research & Creative Works
Resonance absorption spectrometry has been applied in a room temperature study of the reactions of excited neon atoms in pure afterglow plasmas. The pressure range 10-500 Torr was investigated. Lorentz broadened linewidths calculated using a simple classical interruption theory allowed fractional absorption signals as large as 98% to be analyzed and absolute excited-state concentrations to be determined. The first absorption studies of the decay of 1P1 excited atoms in neon afterglows are reported. Analysis of the decay profiles of the 3P2, 3P0 and 1P1 excited states allowed quenching rate coefficients for each state to be determined and the role of …
Evaluation Of Triaxial Testing Equipment And Methodologies Of Three Agencies, Tommy C. Hopkins, David L. Allen
Evaluation Of Triaxial Testing Equipment And Methodologies Of Three Agencies, Tommy C. Hopkins, David L. Allen
Kentucky Transportation Center Research Report
To obtain reliable and consistent shear strength results, which are essential in the design of earth structures, from triaxial tests, careful attention, skill, and judgement must be given to testing procedures and equipment make-up. There are many sources of potential errors in the test, especially when pore pressures are monitored. Consequently, a question inevitably arises concerning tbe quality of triaxial test results obtained by different geotechnical laboratories. The intent of this study was to initiate and help establish a triaxial testing forum whereby any geotechnical laboratory engaged in triaxial testing can check the quality of their triaxial results, and therefore, …
Center Pivot Irrigation In Nebraska: An Institutional Analysis Case Study, Thomas Nutt-Powell, Stewart Landers
Center Pivot Irrigation In Nebraska: An Institutional Analysis Case Study, Thomas Nutt-Powell, Stewart Landers
Biological Systems Engineering: Papers and Publications
This paper is one of a series resulting from institutional analysis of photovoltaic (PV) acceptance. It reports the results of a study of institutional factors influencing acceptance of center-pivot irrigation in the Nebraska agricultural community. Center-point irrigation (CP) was an interesting topic for study because (1) it was a major recently introduced technological innovation in agriculture which (2) had potentially detrimental attributes – water and energy intensity. A brief historical review of the introduction and acceptance of center-pivot irrigation in the Nebraska agricultural community is presented. Institutions which were a likely part of this institutional arena relative to CP introduction …
Lee's Moment Method Applied To Binary Flow In Jet And Channel Devices Used For The Aerodynamic Separation Of Uranium Isotopes, Edward Eugene Holcomb
Lee's Moment Method Applied To Binary Flow In Jet And Channel Devices Used For The Aerodynamic Separation Of Uranium Isotopes, Edward Eugene Holcomb
Mechanical Engineering ETDs
Lees' moment method is applied to the problem of compressible, binary flow of uranium hexafluoride gas through a parallel plate channel. The time-dependent numerical problem is solved to yield the steady state solution. The results obtained are preliminary to the solution of the flow field for the curved nozzle and colliding jet devices used in the aerodynamic separation of uranium isotopes. Lees' concept of two-sidedness of the distribution function doubles the number of variables required to describe the system, and the resulting set of moment equations is not easily solved. The assumptions of isothermal, hydrodynamically fully developed flow are made …
Atmospheric Implications Of Studies Of Central American Volcanic Eruption Clouds, R. D. Cadle, A. L. Lazrus, B. J. Huebert, L. E. Heidt, William I. Rose, D. C. Woods, Raymond L. Chuan, Richard E. Stoiber, D. B. Smith, Robert A. Zielinski
Atmospheric Implications Of Studies Of Central American Volcanic Eruption Clouds, R. D. Cadle, A. L. Lazrus, B. J. Huebert, L. E. Heidt, William I. Rose, D. C. Woods, Raymond L. Chuan, Richard E. Stoiber, D. B. Smith, Robert A. Zielinski
Department of Geological and Mining Engineering and Sciences Publications
During February 1978 a group of scientists from the National Center for Atmospheric Research, several colleges and universities, the U.S. Geological Survey, and NASA used a specially equipped Beech Queen Air aircraft to make 11 sampling flights in Guatemala through the eruption clouds from the volcanoes Pacaya, Fuego, and Santiguito. Measurements were made of SO42−, SO2, HCl, HF, and 11 cations that were in water-soluble form, on samples collected by a specially designed filter pack. Particle size distributions were obtained with a piezoelectric cascade impactor, and the particles were identified by energy dispersive X ray …
Test 1334: Belarus 7100 Diesel (K-701) 16-Speed, Nebraska Tractor Test Lab
Test 1334: Belarus 7100 Diesel (K-701) 16-Speed, 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 …
Test 1333: Belarus 1500 Diesel (T-150k) 12-Speed, Nebraska Tractor Test Lab
Test 1333: Belarus 1500 Diesel (T-150k) 12-Speed, 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 …
Bulletin - November, 1979, Civil Aviation Medical Association
Bulletin - November, 1979, Civil Aviation Medical Association
Browse all Civil Aviation Medical Association Newsletters
An eight page newsletter of the Civil Aviation Medical Association. The newsletter provided news about civil aviation medicine and information related to the organization.
Fire Safe Structural Steel: A Design Guide, Joseph Escalada, Georgi Hall, Brandon Matchen, Hoang Nguyen, Alexander Williams
Fire Safe Structural Steel: A Design Guide, Joseph Escalada, Georgi Hall, Brandon Matchen, Hoang Nguyen, Alexander Williams
CCFSS Library (1939 - present)
In 1974, the Constructional Steel Research and Development Organization (CONSTRADO) of England commissioned Ove Amp & Partners to prepare a detailed technical report setting out the most plausible models of flame projection from openings in building facades and the methods of calculating heat transfer from fires to exterior exposed steel columns. The report and an accompanying calculation method were completed in November 1975. In July 1975, the Subcommittee on Fire Teclmology of the Committee on Construction Codes and Standards of American Iron and Steel Institute commissioned a revised major extension of Ove Amp's work, and a two-volume report was completed …
Proliferation Resistant Reprocessing Methods, Guna S. Selvaduray, L. Heising
Proliferation Resistant Reprocessing Methods, Guna S. Selvaduray, L. Heising
Faculty Publications
No abstract provided.
Irish H & V News - November & December Combined
Irish H & V News - November & December Combined
Building Services Engineering
No abstract provided.
Corrective Measures For Unstable Bridge-Approach Embankment Us 68, Licking River, Blue Licks, E. Gregory Mcnulty
Corrective Measures For Unstable Bridge-Approach Embankment Us 68, Licking River, Blue Licks, E. Gregory Mcnulty
Kentucky Transportation Center Research Report
In January 1979, an in-depth investigation of the unstable bridge-approach embankment, Figure 1, on US 68 over the Licking River in the north central portion of Nicholas County (MP 91-68-B0027) was begun by the Division of Research. This investigation was a continuation of a project initiated by the Division of Materials in 1967. This site is approximately 0.3 miles (0.5 km) north of Stony Creek Road and approximately 7.5 miles (12.0 km) north of Carlisle and 0.8 miles (1.3 km) southwest of Blue Licks Battlefield State Park. The bridge is a three-span, continuous, welded plate girder structure with span lengths …
Seasonal Variations In The Skid Resistance Of Pavements In Kentucky, James L. Burchett, Rolands L. Rizenbergs
Seasonal Variations In The Skid Resistance Of Pavements In Kentucky, James L. Burchett, Rolands L. Rizenbergs
Kentucky Transportation Center Research Report
Frequent measurements of skid resistance were made on 20 pavements in common use in Kentucky. Tests were conducted from November 1969 through 1973. Principal analysis involved relating changes in skid resistance to day of the year and relating skid resistance to temperature at the time of test, to average antecedent temperatures, and to average rainfall.
Seasonal variations exhibited an annual sinusoidal cycle. The changes in sand-asphalt and bituminous concrete surfaces under higher volumes of traffic were about 12 skid numbers. The changes in portland cement concrete and bituminous concrete under lower volumes of traffic were about 5 skid numbers. The …
Proliferation Resistant Reprocessing Methods, Guna S. Selvaduray, L. Heising
Proliferation Resistant Reprocessing Methods, Guna S. Selvaduray, L. Heising
Guna S. Selvaduray
No abstract provided.
Theory And Design Of Cyclotron-Wave Traveling-Wave Amplifiers, Arthur H. Gottfried
Theory And Design Of Cyclotron-Wave Traveling-Wave Amplifiers, Arthur H. Gottfried
Dissertations
A theory and design procedure for traveling-wave tubes using cyclotron-wave interactions is developed. An analysis is presented of the energy exchange mechanism and the axial beam velocity spread induced by the r.f. interactions. The analysis of the energy spread in a realistic model of the beam with nonzero size and nonzero space-charge density shows that higher maximum efficiencies at higher power is attainable (with collector depression) in cyclotron-wave amplifiers than in synchronous-wave amplifiers.
A one-watt, and a ten-watt cyclotron-wave amplifier at 3 GHz, utilizing bifilar helix circuits, scaled from a 2 kW, 5 GHz design, were constructed. A computer was …
Adsorption Capabilities Of Adsorbents For Selected Toxic Air Pollutants, Richard Michael Vaccaro
Adsorption Capabilities Of Adsorbents For Selected Toxic Air Pollutants, Richard Michael Vaccaro
Theses
The relative adsorption capacities of seven toxic, volatile organic air pollutants of either proven or suspected carcinogenic potential were tested on various adsorbents. Tests were run at flow velocities similar to those set in field sampling. This allows for extrapolation of test results to actual ambient air sampling systems. Experimentation was performed using a gas chromatograph (G.C.) equipped with a flame ionization detector. Sample introduction was carried out using the "displacement method" where the sample is introduced to the adsorbent cartridge as a plug.
Incipient elution volumes (VN), normalized for bulk adsorbent packing volume, were obtained at various …
Test 1332: Versatile 875 Diesel 12-Speed, Nebraska Tractor Test Lab
Test 1332: Versatile 875 Diesel 12-Speed, 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 …
Test 1331: Versatile 555 Diesel 15-Speed, Nebraska Tractor Test Lab
Test 1331: Versatile 555 Diesel 15-Speed, 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 …