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Articles 8791 - 8820 of 8896
Full-Text Articles in Physical Sciences and Mathematics
Luminescence In Slipped And Dislocation-Free Laser-Annealed Silicon, R.H. Uebbing, P. Wagner, H. Baumgart, H. J. Queisser
Luminescence In Slipped And Dislocation-Free Laser-Annealed Silicon, R.H. Uebbing, P. Wagner, H. Baumgart, H. J. Queisser
Electrical & Computer Engineering Faculty Publications
Photoluminescence of cw laser-annealed silicon shows a dramatic difference in electronic behavior of the reconstructed material depending upon either creation or suppression of dislocations. Beyond a critical exposure time slip appears, and the luminescence of these samples is dominated by dislocation-related defect levels.
Most Probable Magnetohydrostatic Equilibria For Tokamaks And Reversed Field Pinches, John Joseph Ambrosiano
Most Probable Magnetohydrostatic Equilibria For Tokamaks And Reversed Field Pinches, John Joseph Ambrosiano
Dissertations, Theses, and Masters Projects
The determination of magnetohydrostatic equilibria usually requires that two of the equilibrium functions be given. as there is usually no a priori basis for specifying the form of these two functions, the functions and the equilibria they determine may be considered random.;In this dissertation, the author reviews a recent statistical method for determining the equilibrium of an axially symmetric cylindrical plasma which is most probable (in the maximum entropy sense) given four global constraints (i.e., energy, magnetic helicity, longitudinal magnetic flux, and longitudinal current flux). Previous results from this model have been limited to non-negative random equilibrium functions (B(,z), J(,z), …
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 …
The Economics Of Solar Water Heaters : A Guide For Evaluating The Cost-Effectiveness Of Active Solar Water Heating Systems In Maine, Maine Office Of Energy Resources
The Economics Of Solar Water Heaters : A Guide For Evaluating The Cost-Effectiveness Of Active Solar Water Heating Systems In Maine, Maine Office Of Energy Resources
Maine Collection
The Economics of Solar Water Heaters : A Guide for Evaluating the Cost-Effectiveness of Active Solar Water Heating Systems in Maine
State of Maine, Executive Department, Office of Energy Resources,
Augusta, Maine (July, 1979).
Contents: Section I: Introduction / Section II: Economic Method: The Life Cycle Cost Analysis / Section III: Factors Affecting the Decision to Buy / Section IV: Explanation of the Tables / Table I - Table IIIA
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.
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 …
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 …
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.
Nonlinear Evolution Of The Magnetohydrodynamic Sheet Pinch, William H. Matthaeus
Nonlinear Evolution Of The Magnetohydrodynamic Sheet Pinch, William H. Matthaeus
Dissertations, Theses, and Masters Projects
No abstract provided.
Stable Equilibrium Statistical States For Spheromaks, George Vahala, Linda L. Vahala
Stable Equilibrium Statistical States For Spheromaks, George Vahala, Linda L. Vahala
Electrical & Computer Engineering Faculty Publications
Incompressible nondissipative magnetohydrodynamic turbulence is treated for spherical systems. From the absolute equilibrium expectation values of the fields one can investigate those initially quiescent states for which no large mean square velocity will develop. This stable state is force-free and gives rise to the Hill vortex structure for the magnetic flux surfaces.
Principal Angle, Principal Azimuth, And Principal-Angle Ellipsometry Of Film-Substrate Systems, R. M.A. Azzam, A.-R. M. Zaghloul
Principal Angle, Principal Azimuth, And Principal-Angle Ellipsometry Of Film-Substrate Systems, R. M.A. Azzam, A.-R. M. Zaghloul
Electrical Engineering Faculty Publications
When the film thickness is considered as a parameter, a system composed of a transparent film on an absorbing substrate (in a transparent ambient) is characterized by a range of principal angle ø¯min ≤ ø¯ ≤ ø¯max over which the associated principal azimuth ψ¯ varies between 0° and 90° (i.e., 0° ≤ ψ¯ ≤ 90°) and the reflection phase difference Δ assumes either one of the two values: +π/2 or −π/2. We determine the principal angle ø¯(d) and principal azimuth ψ¯(d) as functions of film thickness d for the vacuum-SiO2-Si system at …
Propagation Of Partially Polarized Light Through Anisotropic Media With Or Without Depolarization: A Differential 4 × 4 Matrix Calculus, R. M.A. Azzam
Propagation Of Partially Polarized Light Through Anisotropic Media With Or Without Depolarization: A Differential 4 × 4 Matrix Calculus, R. M.A. Azzam
Electrical Engineering Faculty Publications
We extend the scope of the Mueller calculus to parallel that established by Jones for his calculus. We find that the Stokes vector S of a light beam that propagates through a linear depolarizing anisotropic medium obeys the first-order linear differential equation dS/dz = mS, where z is the distance traveled along the direction of propagation and m is a 4 × 4 real matrix that summarizes the optical properties of the medium which influence the Stokes vector. We determine the differential matrix m for eight basic types of optical behavior, find its form for the most general anisotropic nondepolarizing …
Consequences Of Light Reflection At The Interface Between Two Transparent Media Such That The Angle Of Refraction Is 45°, R. M.A. Azzam
Consequences Of Light Reflection At The Interface Between Two Transparent Media Such That The Angle Of Refraction Is 45°, R. M.A. Azzam
Electrical Engineering Faculty Publications
The reflection of light at the interface between two transparent, homogeneous and optically isotropic media such that the angle of refraction is 45° has the following interesting consequences: (i) the interface relfectivity for the parallel (p) polarization is the square of that for the perpendicular (s) polarization; (ii) the angular deviation of the propagation direction upon refraction is equal to the polarization (or ellipsometric) angle ψ and (iii) the complex reflection coefficient for the ppolarization is stationary, in both magnitude and phase, with respect to small charges of the (refractive and/or absorptive) optical properties of …
An Analysis Of Investments In Residential Energy Conservation In Southeast Missouri, Ralph Gunderson
An Analysis Of Investments In Residential Energy Conservation In Southeast Missouri, Ralph Gunderson
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
This study examines the economic feasibility of residential solar heating. Climatic and economic variables used in this report represent those of Cape Girardeau, Missouri. An annual cost model is used to determine the conditions under which solar heating achieves a reduced annual cost of heating relative to gas and electric heating systems.
An Analysis Of Solar Heating Costs In Arkansas Broiler Houses, Ralph Gunderson, J. Martin Redfern
An Analysis Of Solar Heating Costs In Arkansas Broiler Houses, Ralph Gunderson, J. Martin Redfern
UMR-MEC Conference on Energy / UMR-DNR Conference on Energy
This study is based on the computer simulation model of a solar heated broiler house in four locations in Arkansas. This simulation model estimated the annual energy savings in each broiler house due to the installation of a solar heating system. This paper uses present value analysis to estimate the life cycle costs of heating conventional and solar heated broiler houses in the state of Arkansas. From these calculations, the number of years required to achieve a break-even cost of heating is estimated.
Emp Analysis Of An Fm Communications Radio With A Long Wire Antenna, George H. Baker Iii, Werner J. Stark
Emp Analysis Of An Fm Communications Radio With A Long Wire Antenna, George H. Baker Iii, Werner J. Stark
George H Baker
A Norton equivalent circuit is developed for a long-wire antenna used with a VHF man-pack FM radio exposed to an incident electromagnetic pulse (EMP). The required short-circuit current and antenna impedance are computed by use of a transmission-line model for the antenna, and the computations are compared with measurements of the short-circuit current and antenna impedance. The comparison shows that the transmission-line model for the antenna is adequate for performing a vulnerability analysis of the radio. A network model is developed for a portion of the radio and is used as the load in the Norton equivalent circuit. Load currents …
Generalized Ellipsometry Based On Azimuth Measurements Alone, R. M.A. Azzam
Generalized Ellipsometry Based On Azimuth Measurements Alone, R. M.A. Azzam
Electrical Engineering Faculty Publications
We investigate the azimuth response function, θo = f(θi), of a linear nondepolarizing optical system S, whereθi and θo, are the azimuths (orientations) of the generally elliptic vibrations of totally polarized light at the input and output of S. We find that the azimuth response function depends on five of the six parameters that specify the normalized circular Jones matrix of the optical system. Thus the entire polarization response of an optical system can be nearly completely reconstructed from its azimuth response alone. Five input-output azimuth measurements (θik, θok), k …
Simulation Of Mechanical Rotation By Optical Rotation: Application To The Design Of A New Fourier Photopolarimeter, R. M.A. Azzam
Simulation Of Mechanical Rotation By Optical Rotation: Application To The Design Of A New Fourier Photopolarimeter, R. M.A. Azzam
Electrical Engineering Faculty Publications
The mechanical rotation of an optical element around the axis of a beam of polarized light can be easily simulated by using the phenomenon of optical rotation. Because optical rotation can be magnetically or electrically induced, virtually any kind of mechanical rotation can be mimicked. This interesting principle is applied to the design of a new Fourier photopolarimeter that uses an oscillating-azimuth retarder (OAR). The OAR consists of a quarter-wave plate surrounded by two ac-excited Faraday cells that produce equal and opposite sinusoidal optical rotations. Analysis of the operation of this polarimeter of no moving parts proves its ability to …
Dickey-Lincoln School Lakes, Maine, Hydro-Power Decision, October 27, 1978, James B. Longley
Dickey-Lincoln School Lakes, Maine, Hydro-Power Decision, October 27, 1978, James B. Longley
Dickey-Lincoln School Lakes Project
The Dickey-Lincoln School Project would consist of two earthfill structures designed to produce peaking and modest intermediate load power from the St. John River The larger of the two dams, the Dickey Dam, would be located immediately above the confluence of the Allagash and St. John Rivers. The Lincoln School Dam would also be located on the Upper St. John River, eleven miles downstream from the Dickey Dam. The Dickey Dam would have a total length of 10,600 feet and a maximum height of 335 feet. The Lincoln School Dam is considerably smaller and would be 1,600 feet long and …
Dickey-Lincoln School Lakes Project Environmental Impact Statement: Appendix F: Terrestrial Ecosystem Analysis (Supplement), New England Division, United States Army Engineer Division
Dickey-Lincoln School Lakes Project Environmental Impact Statement: Appendix F: Terrestrial Ecosystem Analysis (Supplement), New England Division, United States Army Engineer Division
Dickey-Lincoln School Lakes Project
Construction of the proposed Dickey-Lincoln School Lakes Project in Aroostook County, Maine will result in the isolation of an area of land due to the impoundment behind Dickey Dam. This land area is located between the United States - Canadian border, the Little Black River, the impoundment (elevation = 913 feet), the Big Black River, and the Shields Branch of the Big Black River, and comprises 183,768 acres of land. A previous report (ERT, 1977) determined the forest types within two miles of the impoundment but did not extend to the Canadian border. This report addresses the forest types
Dickey-Lincoln School Lakes Project Environmental Impact Statement: Appendix E: Aquatic Ecosystem And Fisheries Studies (Supplement), Christoipher J. Schmitt, Dennis R. Sasseville, Normandeau Associates, Inc., New England Division, United States Army Engineer Division
Dickey-Lincoln School Lakes Project Environmental Impact Statement: Appendix E: Aquatic Ecosystem And Fisheries Studies (Supplement), Christoipher J. Schmitt, Dennis R. Sasseville, Normandeau Associates, Inc., New England Division, United States Army Engineer Division
Dickey-Lincoln School Lakes Project
Sediment mercury concentrations higher than levels normall y considered trace or background were encountered up to 80 cm belo w the sediment-water interface in samples obtained from four oligotrophi c lakes in northern Maine . These lakes are in three different watershed s and are as far as 65 km apart . The values reported are far lower than levels reported elsewhere from contaminated sites . The distributio n and magnitude of the sediment concentrations encountered suggest long-ter m diffuse mercury inputs to the lakes from the watersheds . In addition , concentrations up to twice as high in near-surface …
Dickey-Lincoln School Lakes Project Environmental Impact Statement: Appendix C: Social & Economic Assessment (Supplement 1), Pamela D. Savetsky, New England Division, United States Army Engineer Division
Dickey-Lincoln School Lakes Project Environmental Impact Statement: Appendix C: Social & Economic Assessment (Supplement 1), Pamela D. Savetsky, New England Division, United States Army Engineer Division
Dickey-Lincoln School Lakes Project
A review of available literature on rural communities which have been affected by construction projects of a similar scale has been completed. This review will aid in the development of a scenario of the construction labor peak and decline effects on the Dickey-Lincoln area.
Dickey-Lincoln School Lakes Project Environmental Impact Statement: Appendix J: Coordination With Other Agencies & Public Involvement (Supplement), New England Division, United States Army Corps Of Engineers
Dickey-Lincoln School Lakes Project Environmental Impact Statement: Appendix J: Coordination With Other Agencies & Public Involvement (Supplement), New England Division, United States Army Corps Of Engineers
Dickey-Lincoln School Lakes Project
This agency will be particularly concerned about any impact which this project might have on any existing, proposed or known units of the National Park System, or any known historic, natural or environmental education sites which are currently part of , or eligible for, the National Landmark Program. This report is a planning aid for the proposed Dickey-Lincoln Dams and Reservoirs project in Maine. A number of endangered, rare, or unique animal species are known or suspected to occur in the project area.
Dickey-Lincoln School Lakes Project Transmission Studies Environmental Impact Statement: Appendix A, United States Department Of Energy
Dickey-Lincoln School Lakes Project Transmission Studies Environmental Impact Statement: Appendix A, United States Department Of Energy
Dickey-Lincoln School Lakes Project
The U.S. Departments of the Interior and Energy have conducted system planning, location, and environmental studies for the trans-mission facilities required for the Dickey-Lincoln School Hydroelectric Project. These studies of many alternate routes have resulted in iden-tification of a proposed transmission line route, and an environmental impact statement, as required by the National Environmental Policy Act of 1969. This report, documenting an early phase of the overall studies, was first published by the Department of the Interior in February 1977. It is being republished as Appendix A to the DOE Environmental Impact Statement for the project.
Dickey-Lincoln School Lakes Project Transmission Studies Environmental Impact Statement: Appendix H: Socio-Economic Impact Study, Edward C. Jordan Co., Inc., United States Department Of Energy
Dickey-Lincoln School Lakes Project Transmission Studies Environmental Impact Statement: Appendix H: Socio-Economic Impact Study, Edward C. Jordan Co., Inc., United States Department Of Energy
Dickey-Lincoln School Lakes Project
The principal objective of this study is to identify the major types and intensity of social and economic impacts anticipated with the proposed pre-construction, construction, operation and maintenance of the Dickey-Lincoln transmission line. In order to address the types of anticipated impacts it was necessary to first develop a socio-economic profile of the affected area.
Dickey-Lincoln School Lakes Project Transmission Studies Environmental Impact Statement: Appendix D: Transmission Reconnaissance Study, U.S. Department Of The Interior, U.S. Department Of Energy
Dickey-Lincoln School Lakes Project Transmission Studies Environmental Impact Statement: Appendix D: Transmission Reconnaissance Study, U.S. Department Of The Interior, U.S. Department Of Energy
Dickey-Lincoln School Lakes Project
This report (Transmission Reconnaissance Studies) discusses alternative transmission facilities needed to connect the project with the New England grid, and describes the study area involved. It supplements the Transmission System PI anning Study prepared by the Department of Interior (DOI) (February 1977) and the Assessment of Alternative Power Transmission Corridors prepared by VTN Consolidated (VTN) of Boston Mass., for the Dickey-Lincoln School Lakes project.
Revised Draft Impact Statement Issued For Dickey-Lincoln, New England Division, United States Army Engineer Division, United States Army Corps Of Engineers
Revised Draft Impact Statement Issued For Dickey-Lincoln, New England Division, United States Army Engineer Division, United States Army Corps Of Engineers
Dickey-Lincoln School Lakes Project
Revised draft combines data previously published in two separate impact statements prepared by the corps relating to the dams, reservoirs and power plants and by the U. S. Department of Energy for transmission facilities to link the St. John River development to the New England power grid. The latter agency is responsible for the marketing and distribution of power generated at federally-financed installations.
Dickey-Lincoln School Lakes Project Transmission Studies Environmental Impact Statement: Appendix F: Geotechnical Impact Study, Jordan Gorrill Associates, Edward C. Jordan Co., Inc., United States Department Of Energy
Dickey-Lincoln School Lakes Project Transmission Studies Environmental Impact Statement: Appendix F: Geotechnical Impact Study, Jordan Gorrill Associates, Edward C. Jordan Co., Inc., United States Department Of Energy
Dickey-Lincoln School Lakes Project
The U.S. Departments of the Interior and Energy have conducted system planning, location, and environmental studies for the trans-mission facilities required for the Dickey-Lincoln School Hydroelectric project. These studies of many alternate routes have resulted in iden-tification of a proposed transmission line route and an environmental impact statement, as required by the National Environmental Policy Act of 1969. This report, one of several prepared under contract to the DOE by various consultants, is published as an appendix to that statement. Appendix F, Geotechnical Impact Study (two volumes, the second being a map volume), documents a study performed by E. C. …
Alternative Power Transmission Corridors. Map Volume., United States. Department Of Energy
Alternative Power Transmission Corridors. Map Volume., United States. Department Of Energy
Dickey-Lincoln School Lakes Project
Source data for base map taken from US Geological Survey Topographic Maps. 1:250.000 scale series. Horizontal and vertical control depicted herein is relative to the U S.G S source maps.
Revised Draft Impact Statement Issued For Dickey-Lincoln, New England Division, United States Army Corps Of Engineers
Revised Draft Impact Statement Issued For Dickey-Lincoln, New England Division, United States Army Corps Of Engineers
Dickey-Lincoln School Lakes Project
The revised draft combines data previously published in two separate impact statements prepared by the Corps relating to the dams, reservoirs and Power Plants and by the U. S. Department of Energy for transmission facilities to link the St. John River development to the New England power grid.