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Articles 32161 - 32190 of 32952
Full-Text Articles in Entire DC Network
21st Rocky Mountain Conference On Analytical Chemistry
21st Rocky Mountain Conference On Analytical Chemistry
Rocky Mountain Conference on Magnetic Resonance
Abstracts and meeting program from the 21st annual meeting of the Rocky Mountain Conference on Analytical Chemistry, co-sponsored by the Rocky Mountain Section of the Society for Applied Spectroscopy and the Rocky Mountain Chromatography Discussion Group. Held in Denver, Colorado, July 30 - August 1, 1979.
Direct Relation Between Fresnel’S Interface Reflection Coefficients For The Parallel And Perpendicular Polarizations, R. M.A. Azzam
Direct Relation Between Fresnel’S Interface Reflection Coefficients For The Parallel And Perpendicular Polarizations, R. M.A. Azzam
Electrical Engineering Faculty Publications
We have found a significant relation, rp = rs (rs -cos2ϕ)/(1-rs cos2ϕ), between Fresnel’s interface complex-amplitude reflection coefficients rp and rs for the parallel (p) and perpendicular (s) polarizations at the same angle of incidence ϕ. This relation is universal in that it applies to reflection at all interfaces between homogeneous isotropic media collectively and, of course, throughout the electromagnetic spectrum. We investigate the properties of this function, rp = f (rs), and its inverse,rs = g (rp), as …
Properties Of A Coaxial Cw Co₂ Laser, T.-K. Cheng Ken, Lee W. Casperson
Properties Of A Coaxial Cw Co₂ Laser, T.-K. Cheng Ken, Lee W. Casperson
Electrical and Computer Engineering Faculty Publications and Presentations
A cw CO₂ laser has been developed in which the active medium is formed by a discharge between coaxial electrodes. The laser gain and saturation properties have been studied as functions of the various device parameters. Over-all efficiency is about the same as for a conventional longitudinal discharge laser, and advantages of the coaxial geometry include low voltage operation, rapid cooling, and rugged construction.
Continuous Fractionation Of Protein Mixtures By Ph-Parametric Pumping, Yuk-Wei Wong
Continuous Fractionation Of Protein Mixtures By Ph-Parametric Pumping, Yuk-Wei Wong
Theses
Continuous pH-parametric pumping separations of a haemoglobin - albumin - CM Separose system were experimentally investigated. The parapump system has a feed, containing the protein mixture to be separated, introduced alternately to the top and bottom of the chromatographic column. The top and bottom products are withdrawn from the apparatus during the bottom and top feed respectively. It is shown that under certain conditions the pH-driven parametric pump has the capacity for removal of a protein component from one product fraction and large enrichment in the other fraction. Moreover, the continuous process can be operated with a large feed throughput.
Noise Pollution In The Industrial Arts Laboratory, James A. Sundell
Noise Pollution In The Industrial Arts Laboratory, James A. Sundell
Graduate Research Papers
Industrial arts instructors have always recognized the need for a pleasant and safe environment in their laboratories. Advancements in technology have increased noise pollution in this environment.
Sounds have a useful and important place in the laboratory; also, they can have adverse effects. The instructor can tell immediately if a machine is not performing correctly by the sound it emits, while the operation of the same machine can distort an important verbal communication. Excessive decibel levels may be generated at different times threatening the psychological and physiological well-being of teachers and students (Brown, 1979; Hicks, 1973; Swogger, 1973).
Reduction of …
Relations Between Amplitude Reflectances And Phase Shifts Of The P And S Polarizations When Electromagnetic Radiation Strikes Interfaces Between Transparent Media, R. M.A. Azzam
Electrical Engineering Faculty Publications
No abstract provided.
Acuta Enews June 1979, Vol. 8, No. 6
Acuta Enews June 1979, Vol. 8, No. 6
ACUTA Newsletters
In This Issue
PRESIDENT'S MESSAGE
LETTER TO THE EDITOR
PARTY LINE
BITS & PIECES
VIRGINIA VIEW
MOUTH OF THE SOUTH
Acuta Enews May 1979, Vol. 8, No. 5
Acuta Enews May 1979, Vol. 8, No. 5
ACUTA Newsletters
In This Issue
PRESIDENT'S MESSAGE
PARTY LINE
BITS & PIECES
POTPOURRI
MOUTH OF THE SOUTH
VIRGINIA VIEW
Spectral Signature Studies For Application In Deer Census Using Remote Sensing Techniques, Maran C. Pate
Spectral Signature Studies For Application In Deer Census Using Remote Sensing Techniques, Maran C. Pate
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This study was performed to determine the spectral signatures of deer and their natural background elements for censusing purposes. Consideration was given to atmospheric transmittance, acceptable flying weather, and terrain. Possible spectral bands between 0.3 and 14.0 μm were obtained (over a pathlength of 1500 feet at an altitude of 5000 feet) based upon atmospheric transmittance using the LOWTRAN 3B computer program. They are: 0.30 - 1.33, 1.49 - 1.79, 2.00 - 2.50, 3.00 - 3.16, 3.38 - 4.10, 4.59 - 5.05, and 8.00 - 13.33 μm, for transmittance greater than 75%. Weather conditions are favorable for flying and taking …
Deep Penetration Of Electrons Into Homogeneous Media By The Method Of Condensed Collisions, Joseph Francis Janni
Deep Penetration Of Electrons Into Homogeneous Media By The Method Of Condensed Collisions, Joseph Francis Janni
Chemical and Biological Engineering ETDs
The objective of this dissertation was to develop an accurate and efficient alternative to presently available methods of calculating the steady state penetration of electrons deep into homogeneous materials. A thorough solution must include scalar fluxes, net currents, angular distributions, and differential energy spectra. This research has successfully developed the method of condensed collisions, which provides an alternative to methods now in use for the solution of the electron transport problem. The condensed collsion method is general, but has been applied specifically to deep penetration electron transport to demonstrate its utility. The present aplication was for electrons having incident energies …
The Effect Of Earth Media On Seismic Motion And Structure Response, Joseph John Fedock
The Effect Of Earth Media On Seismic Motion And Structure Response, Joseph John Fedock
Civil Engineering ETDs
An analysis is performed to determine the influence of the choice of a constitutive model for the earth medium upon the response of a rigid structure to seismic waves. A finite element method is employed to analyze the motions of an embedded structure in which the surrounding earth medium is represented by three different constitutive models. Linear elastic, linear viscoelastic, and elastic-plastic models of soil behavior are utilized in one- and two-dimensional analyses. The seismic disturbance is characterized by a pressure wave for the one-dimensional case while a system of horizontally propagating Rayleigh waves is used in the two-dimensional analysis. …
Coupling Efficiency And Alignment Sensitivity Of Single Mode Optical Fibers, James Mathew Martin
Coupling Efficiency And Alignment Sensitivity Of Single Mode Optical Fibers, James Mathew Martin
Retrospective Theses and Dissertations
Coupling efficiency an alignment sensitivity models for the coupling of light from a fundamental mode Gaussian light beam into a single mode optical fiber are given. Experimental results are presented which verify the coupling and misalignment predictions of the models. Data were taken at two wavelengths: 0.6328 and 0.8460 micrometers. The light sources were a HeNe laser and a GaAlAs laser respectively. Coupling efficiencies were measured versus beam spot size; and lateral, axial and angular misalignments of the beam and fiber axes.
Optimization Of Stormwater Management Practices And Processes, Mark Michael Calabrese
Optimization Of Stormwater Management Practices And Processes, Mark Michael Calabrese
Retrospective Theses and Dissertations
In recent years, stormwater has been found to be a major source of pollution to receiving waters. Major research efforts have been directed in this area, primarily as a result of the Federal Water Pollution Control Act and Public law 92-500, the 1972 Amendments to the act. Yet, a need remains for more data in the field of stormwater management. Such needs include cost-performance data and planning methodologies to optimally select best management practices (BMP's). The research culminating in this report addresses these needs. A computer program, "MANAGE", has been written to generate cost/efficiency curves, and uses these curves to …
Energy In Agriculture: Energy For Greenhouses Part 1: Energy Conservation, George A. Duncan, John N. Walker, Larry W. Turner
Energy In Agriculture: Energy For Greenhouses Part 1: Energy Conservation, George A. Duncan, John N. Walker, Larry W. Turner
Agricultural Engineering Energy Series
The increased cost and scarcity of all fuels have affected the greenhouse owner as badly as any segment of industry. For some, crops have been damaged or lost. For others, it has reduced the margin of profit. Growers, manufacturers, suppliers, horticulturists, engineers and many others have studied the situation thoroughly in order to come up with viable solutions and alternatives for conserving fuel.
A Co-Op Advertising Information System, Kay C. Gardner
A Co-Op Advertising Information System, Kay C. Gardner
Retrospective Theses and Dissertations
This report presents the development of a business information system for co-op advertising. An underlying assumption is that information systems add value to an organization. It is an application of data bank theory, and demonstrates the techniques required to maintain a current information system, i.e., add, change, and delete capabilities. The master file is sequentially accessed to produce reports by participation percentage, classification, or expiration date.
Transformation Of Fresnel’S Interface Reflection And Transmission Coefficients Between Normal And Oblique Incidence, R. M.A. Azzam
Transformation Of Fresnel’S Interface Reflection And Transmission Coefficients Between Normal And Oblique Incidence, R. M.A. Azzam
Electrical Engineering Faculty Publications
If w denotes an interface Fresnel reflection or transmission coefficient for s- or p-polarized light at an oblique angle of incidence ø, and z denotes the same coefficient at normal incidence, we find that w is an analytic function of z, w = ƒ(z), that depends on ø but not on the specific optical properties of the two media on both sides of the interface. All four functions that correspond to the four distinct Fresnel coefficients and their inverses are determined. We single out for detailed examination, as an example, the relationship between the reflection of s -polarized light at …
The University, Electrical Engineering And Space Travel, Doran Baker
The University, Electrical Engineering And Space Travel, Doran Baker
Faculty Honor Lectures
In this paper, my purpose is three-fold: First, to tell some of the story of the development of the Engineering College at Utah State University; second, to present selected concepts and applications in the evolution of electrical engineering; third, to relate these concepts and developments to our space venture and to the twenty-first century_ My perspective is that of a school teacher, engineer, scientist and historian; superimposed upon this is my imbedment in the system as an administrator of teachers and researchers. I intend to strike a balance between generality and depth, between technology and philosophy, and between perception and …
Acuta Enews April 1979, Vol. 8, No. 4
Acuta Enews April 1979, Vol. 8, No. 4
ACUTA Newsletters
In This Issue
PRESIDENT'S MESSAGE
PARTY LINE
BITS & PIECES
POTPOURRI
VIRGINIA VIEW
MOUTH OF THE SOUTH
Reflection Of An Electromagnetic Plane Wave With 0 Or Π Phase Shift At The Surface Of An Absorbing Medium, R. M.A. Azzam
Reflection Of An Electromagnetic Plane Wave With 0 Or Π Phase Shift At The Surface Of An Absorbing Medium, R. M.A. Azzam
Electrical Engineering Faculty Publications
An electromagnetic plane wave incident obliquely from a transparent medium onto the surface of an absorbing medium can be reflected with 0 or π phase shift if (i) the wave is p (TM) polarized, and (ii) the complex relative dielectric function ε is such that 0 ≤|ε| 2/2Re(ε) ≤ 1. Furthermore, the locus of ε such that the reflection coefficient for the p polarization is real at the same angle of incidence, is a circle, and that of ε½ (the complex relative refractive index) is Bernoulli’s lemniscate.
The Effect Of Laboratory Compaction On The Compressibility Of Compacted Highly Plastic Clay : Interim Report, Albert Dibernardo, C. W. Lovell
The Effect Of Laboratory Compaction On The Compressibility Of Compacted Highly Plastic Clay : Interim Report, Albert Dibernardo, C. W. Lovell
JTRP Technical Reports
No abstract provided.
Final Report On Project Feasibility : To Jacksonville Transportation Authority, November, 1979, Parsons Brinckerhoff, Flood &. Associates
Final Report On Project Feasibility : To Jacksonville Transportation Authority, November, 1979, Parsons Brinckerhoff, Flood &. Associates
Jacksonville and Duval Co. Miscellaneous
This report was prepared for the purpose of determining the feasibility of the DPM for the Jacksonville CBD. The gathering of data, the preparation of information, the research, the citizens' participation, the alternatives analysis, and the detailed planning were all done for the purpose of answering one basic question: Is a downtown people mover feasible for Jacksonville?
Molybdenum Stability In Coal Slags At 1400⁰C: Corrosion Properties For Mhd Electrode Applications., Kenton Brian Wright
Molybdenum Stability In Coal Slags At 1400⁰C: Corrosion Properties For Mhd Electrode Applications., Kenton Brian Wright
Masters Theses
"Molten coal slag corrosion studies conducted on molybdenum at 1400°C used static and stirred slag experiments and electrical current experiments to parallel electrode conditions of slagging duct MHD generators. Crucibles containing molybdenum and slag were exposed to combustion-type gases in a tube furnace. Carbon monoxide-carbon dioxide gas mixtures controlled oxygen partial pressures at selected values between 10-11 and 10-3 atm. Metallograph and microprobe examination of polished sample sections defined corrosion characteristics.
At 1400°C, molybdenum metal is stable below 10-9 atm oxygen pressure. Molybdenum dioxide is stable at higher pressure, but volatile molybdenum trioxides prevent formation of stable …
A Mathematical Hydrodynamic Circulation Model Of Great Salt Lake For Resource Management, Gary Z. Watters, Charles T. Kincaid
A Mathematical Hydrodynamic Circulation Model Of Great Salt Lake For Resource Management, Gary Z. Watters, Charles T. Kincaid
Reports
In the Great Basin region of this country, the resource which has always been of great importance is water. In Utah, the proper management of the resources of Great Salt Lake and the watersheds tributary to it, has become a topic of increasing concern. Recently, much emphasis has been placed on developing the recreational and industrial resources of Great Salt Lake. For optimum economic and social benefits from future development plans, the lake and its tributary watersheds need to be considered in terms of a single entity. In this regard, the Utah Water Research Laboratory (UWRL) has conducted several studies …
Studies On Viruses In Water, Rex S. Spendlove, Bill B. Barnett, Dennis B. George, Dennis J. Adams, Stanley F. Hayes, Ronald B. Dean, David Ridinger, Darwin L. Sorensen
Studies On Viruses In Water, Rex S. Spendlove, Bill B. Barnett, Dennis B. George, Dennis J. Adams, Stanley F. Hayes, Ronald B. Dean, David Ridinger, Darwin L. Sorensen
Reports
A new procedure for the detection of viral antigens in fecal material was developed. The test is performed by first diluting a fecal sample with phosphate buffered saline to give a liquid consistency. The pH is then adjusted to 8.5-9.0 and the solids are allowed to settle for five minutes. Supernatant fluid from above the fecal sediment is placed on the upper surface of a well of an inverted Immulon microtiter plate and incubated for one hour at 37 degrees C to allow virus to adsorb to the plastic. The Immulon plate is then washed three times with a Tween …
Erosion Control Product Testing, C. Earl Israelsen, Eugene K. Israelsen, Joel E. Fletcher, Jerald S. Fifield, Ronald V. Canfield
Erosion Control Product Testing, C. Earl Israelsen, Eugene K. Israelsen, Joel E. Fletcher, Jerald S. Fifield, Ronald V. Canfield
Reports
Introduction: Fibrex Corporation has capability for manufacturing various blends of cellulose fibers which have been used at locations throughout the country for temporarily controlling erosion on denuded land areas, and for serving as growth media for grass and other vegetation. Soil and climatic conditions vary greatly where these products are used, and it is not possible to determine by observation whether one is more effective than another in controlling erosion or promoting vegetative growth. Fibrex is desirous of knowing with some degree of confidence which products have the highest level of erosion control so that additional efforts can be directed …
Stochastic Analysis For Water Quality, Ronald F. Malone, David S. Bowles, William J. Grenney, Michael P. Windham
Stochastic Analysis For Water Quality, Ronald F. Malone, David S. Bowles, William J. Grenney, Michael P. Windham
Reports
This report demonstrates the feasibility of applying stochastic techniques to linear water quality models. The Monte Carlo, First Order, and Generation of Moment Equation techniques are applied to a long term phosphorus model of Lake Washington. The effect of uncertainty of the phosphours loading term on simulated phosphous levels is analyzed. All three stochastic techniques produced the same results. The simulated concentrations of phosphorus in the water column are very responsive to uncertainty in annual phosphorus loading, the sediment concentrations relatively insensitive. The Monte Carlo technique is shown to require the most computation time of the three stochastic techniques applied. …
Evaluation Of In-Line Direct Filtration For Virus Removal, Behjat Sadat Malek, Dennis B. George, Daniel S. Filip, Bill B. Barnett
Evaluation Of In-Line Direct Filtration For Virus Removal, Behjat Sadat Malek, Dennis B. George, Daniel S. Filip, Bill B. Barnett
Reports
The purposes of this study were to evaluate virus removal in treatment of water supplies by an in-line direct filtration pilot plant system and to suggest a system design to enhance virus removal. Isotherm and jar tests were conducted to evaluate the effects of pH, sodium ion concentration, and coagulants (alum and cationic polyelectrolytes Cat-Floc T, Nalco 8102, and 8103) on the bacteriophage MS2 contained in water. Isotherm studies were also conducted to assess the kinetic adsorption of MS2 to sand, anthracite, and garnet. Rapid sand, dual-media, and multi-media filters were tested in continuous in-line direct filtration operations. Approximately 95 …
Effects Of Oil Shale Leachate On Phytoplankton Productivity, Mary Louise Cleave, V. Dean Adams, Donald B. Porcella
Effects Of Oil Shale Leachate On Phytoplankton Productivity, Mary Louise Cleave, V. Dean Adams, Donald B. Porcella
Reports
The effects of oil shale leachate and salinity additions on the productivity of freshwater algae were studied in the laboratory using batch bioassays. These batch bioassays were used to screen variations of ten salts in single and multiple additions of all possible combinations of the ten salts; water extractions of different processed and unprocessed oil shales; and the concentration effects of both the salts from 0.3 N to 0.05 N as NaCl and the oil shale extractions on the growth of standard test algae and indigenous algae from Lake Powell. The batch bottle bioassays were conducted following the standard algal …
Proceedings Of The Utah Water Pollution Control Association, 1979 Annual Meeting, Kathleen E. Bayn
Proceedings Of The Utah Water Pollution Control Association, 1979 Annual Meeting, Kathleen E. Bayn
Reports
Preface: This volume is the third published proceedings of the Utah Water Pollution Control Association's Annual Meeting. The Technical Program of the 1979 Annual Meeting was divided into four separate sessions. The opening session (Session I) provided an overview and direction for the entire meeting. Session II-A: Plant Safety, and Session III-A: Plant Safety, centered on the need for establishing appropriate safety procedures at wastewater installations. Session II-B: Selected Topics, was devoted to technical presentations of speical merit and interest to the local environmental engineering profession. Session III-B: Interim Upgrading, considered various alternatives to upgraiding wastewater facilities on an interim …
Modeling The Performance Of The Intermittent Sand Filter, P. A. Cowan, E. J. Middlebrooks
Modeling The Performance Of The Intermittent Sand Filter, P. A. Cowan, E. J. Middlebrooks
Reports
Several models were developed to predict the efficiency of the intermittent sand filter (ISF) in removing algae from wastewater stabilization pond effluent; volatile suspended solids (VSS) was the analytical technique used to identify algal concentrations. The first (ISF model) and second (modified ISF model) models consisted of two distinct portions: a surface algal layer (SAL) component and a sand phase component. In the ISF model, the sand phase component was described in terms of 20 empirical sand filter efficiency terms (20 ^ coefficients); in the modified ISF model, a functional relationship between ^ and filter depth was developed. The modified …