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Articles 3361 - 3390 of 3488
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Growth Of Tungsten Selenide Films Through Pyrolytic Conversion And Anodic Electrooxidation Of Ammonium Selenotungstate ((Nh4)2wse4), R. D. Engelken, T. (Thomas) P. Van Doren, Jack L. Boone, A. K. Berry, A. Shahnazary
Growth Of Tungsten Selenide Films Through Pyrolytic Conversion And Anodic Electrooxidation Of Ammonium Selenotungstate ((Nh4)2wse4), R. D. Engelken, T. (Thomas) P. Van Doren, Jack L. Boone, A. K. Berry, A. Shahnazary
Electrical and Computer Engineering Faculty Research & Creative Works
WxSey thin films have been prepared by the spray pyrolysis and anodic electrodeposition of solutions of ammonium selenotungstate, (NH4)2WSe4, with y/x usually between two and three for the sprayed films and y x>>1 for the electrodeposited films. The sprayed films indicated regions of crystalline WSe2 and have optical absorbance spectra consistent with a mixture of WSe2, WSe3, and selenium. The electrodeposited films are totally amorphous, highly photoconductive, and have optical absorbance spectra typical of amorphous or vitreous selenium. The sprayed films transform into WO3 at temperatures greater than 350°C in the presence of oxygen wile the electrode-posited films tend …
Laser-Induced Surface Diffusion, Cheng-Hsiao Wu, Jonathan I. Gittleman
Laser-Induced Surface Diffusion, Cheng-Hsiao Wu, Jonathan I. Gittleman
Electrical and Computer Engineering Faculty Research & Creative Works
A Brownian motion model for laser-induced surface diffusion is proposed to account for the kinetics of surface transport of the evaporated molecules from a thin discontinuous film under a focused laser beam. The model is solved exactly where the evaporation rate of the molecules is assumed to be proportional to the temperature rise above the ambient of the absorber layer. The surface diffusion constant and molecular velocity are obtained by comparing the results of calculations with transmission electron micrographs of recorded pits in Te trilayer opticial discs. These values are in good agreement with Einstein's relation.
Correction To “Two-Dimensional Markov Representations Of Sampled Images”, John A. Stuller
Correction To “Two-Dimensional Markov Representations Of Sampled Images”, John A. Stuller
Electrical and Computer Engineering Faculty Research & Creative Works
No abstract provided.
On The Relation Between Triangular Matrix Decomposition And Linear Interpolation, John A. Stuller
On The Relation Between Triangular Matrix Decomposition And Linear Interpolation, John A. Stuller
Electrical and Computer Engineering Faculty Research & Creative Works
The December 1983 Letter by C. W. Therrien Concerning the Relation between Triangular Matrix Decomposition and Linear Prediction is Extended to Include Linear Interpolation. © 1984 IEEE
A Microprocessor-Controlled Message Display System, Paul D. Stigall, Brian E. Lenharth
A Microprocessor-Controlled Message Display System, Paul D. Stigall, Brian E. Lenharth
Electrical and Computer Engineering Faculty Research & Creative Works
No abstract provided.
Experimental Investigation Of The Field And Stray Losses Of The End Bells Of An Induction Motor, Hu Ming-Zheng, George Mcpherson
Experimental Investigation Of The Field And Stray Losses Of The End Bells Of An Induction Motor, Hu Ming-Zheng, George Mcpherson
Electrical and Computer Engineering Faculty Research & Creative Works
No abstract provided.
Statistical Analysis Of Breakdown In Transformer Oil., J. Derald Morgan, M. A. Abdellah, Frank Ferracane
Statistical Analysis Of Breakdown In Transformer Oil., J. Derald Morgan, M. A. Abdellah, Frank Ferracane
Electrical and Computer Engineering Faculty Research & Creative Works
The statistics of breakdown for transformer oil in a uniform field gap is an important design consideration. The theoretical probability distribution which closely fits the experimental data under 60 Hz ac voltage, positive and negative lightning impulses and positive and negative switching surges is evaluated and a statistical distribution is suggested.
Distribution System Protection With Decentralized Generation Introduced Into The System, Behruz Fardanesh, Earl F. Richards
Distribution System Protection With Decentralized Generation Introduced Into The System, Behruz Fardanesh, Earl F. Richards
Electrical and Computer Engineering Faculty Research & Creative Works
Cogeneration from renewable energy sources has been universally proposed as a partial alternative to the solution of our nation's energy problems. New technical, safety, and operational problems are introduced when this generation is placed into a distribution grid. Addressed is the problem of distribution system protection with the introduction of cogeneration sources and the changes and modifications which may be required in the application of present-day protection devices. A sample system is considered, and system protection and coordination with and without cogeneration has been calculated through a digital fault and system protection coordination program. The results indicate through the study …
Limiting Efficiencies For Multiple Energy-Gap Quantum Devices, Cheng-Hsiao Wu, Richard M. Williams
Limiting Efficiencies For Multiple Energy-Gap Quantum Devices, Cheng-Hsiao Wu, Richard M. Williams
Electrical and Computer Engineering Faculty Research & Creative Works
We have used a thermodynamic model to calculate theoretical limiting efficiencies for simple and multiple gap solar cells. The limiting efficiency is 26% for a simple solar cell of hydrogenated amorphous silicon, operating at one Sun sensitivity. For a multiple gap cell made from hydrogenated amorphous silicon, together with a second cell, made from a material with lower band gap, it is 38%. The optimum band gap for the second material is 1.0 eV.
Line-Adaptive Hybrid Coding Of Images, Tai On Tam, John A. Stuller
Line-Adaptive Hybrid Coding Of Images, Tai On Tam, John A. Stuller
Electrical and Computer Engineering Faculty Research & Creative Works
This Paper Describes Novel Adaptation Strategy for Hybrid Transform/DPCM Image Coders. This Strategy Has Yielded a 2–8 DB Increase in Signal-To-Noise Ratio in the Transmission of a Head and Shoulders Image at Bit Rates of 1–4 Bits Per Pel and One-Dimensional Transform Block Sizes of 2–16. © 1983 IEEE
Improved Wavenumber Resolution For Small Arrays, Richard E. Dubroff
Improved Wavenumber Resolution For Small Arrays, Richard E. Dubroff
Electrical and Computer Engineering Faculty Research & Creative Works
The Objective of the Method Described is to Compute the Fourier Transform of a Function of Space and Time with a Significant Improvement in the Resolution of Spatial Frequencies, particularly in the Case of Small Arrays for Which the Size of the Array is on the Order of One Wavelength (Or less). This Improvement is Initially Developed by Considering the Conversion of Spatial Frequency into Temporal Frequency through the Oscillatory Motion of a Single Receiver. a More Practical Scheme is Next Presented in Which the Oscillatory Motion is Created Synthetically by the Appropriate Sequential Sampling of Individual Elements in a …
Considerations In Developing And Utilizing Operator Training Simulators, T. E. Dyliacco, J. D. Schoeffler, M. K. Enns, J. J. Quada, D. L. Rosa, C. W. Jurkoshek, Max Darwin Anderson
Considerations In Developing And Utilizing Operator Training Simulators, T. E. Dyliacco, J. D. Schoeffler, M. K. Enns, J. J. Quada, D. L. Rosa, C. W. Jurkoshek, Max Darwin Anderson
Electrical and Computer Engineering Faculty Research & Creative Works
No abstract provided.
The Application Of Bond Graphs To Electrical Machinery And Power Engineering, K. Sirivadhna, Earl F. Richards, Max Darwin Anderson
The Application Of Bond Graphs To Electrical Machinery And Power Engineering, K. Sirivadhna, Earl F. Richards, Max Darwin Anderson
Electrical and Computer Engineering Faculty Research & Creative Works
No abstract provided.
Analysis Of The Isolated Induction Generator, L. Ouazenne, George Mcpherson
Analysis Of The Isolated Induction Generator, L. Ouazenne, George Mcpherson
Electrical and Computer Engineering Faculty Research & Creative Works
No abstract provided.
Bibliography Of Power Systems Operator Training Resources Ieee Committee Report Prepared By The Pes Working Group On Operator Training (Wg78-4), Max Darwin Anderson
Bibliography Of Power Systems Operator Training Resources Ieee Committee Report Prepared By The Pes Working Group On Operator Training (Wg78-4), Max Darwin Anderson
Electrical and Computer Engineering Faculty Research & Creative Works
This paper provides a current listing of training courses, programs, and resource materials for Power System Operator/ Dispatcher training. The training resources are subdivided into five (5) categories: I. Dispatcher training courses and facilities developed by the Suppliers/Manufacturers II. University Short Courses III. Conference Publications IV. Reference Books V. Correspondence Courses A brief description of the offerings of each of the Suppliers/ Manufacturers is included. Copyright © 1983 by The Institute of Electrical and Electronics Engineers, Inc.
Considerations In Developing And Utilizing Operator Training Simulators, T. E. Dyliacco, M. K. Enns, J. D. Schoeffler, J. J. Quada, D. L. Rosa, C. W. Jurkoshek, Max Darwin Anderson
Considerations In Developing And Utilizing Operator Training Simulators, T. E. Dyliacco, M. K. Enns, J. D. Schoeffler, J. J. Quada, D. L. Rosa, C. W. Jurkoshek, Max Darwin Anderson
Electrical and Computer Engineering Faculty Research & Creative Works
Effective electric system operation depends on strengthening the relationship between the system operator and the electrical system with its associated control system. This relationship can be developed through a training medium which increases the operator's knowledge of the behavior of the power system under various operating conditions and contingencies, and its response to control actions. An Operator Training Simulator (OTS), which simulates the static and dynamic responses of the operator's power system and his control system, can accomplish these training objectives. The concepts developed in this paper are based on the work of the project team through funding by the …
Estimation Of Ocean Wave Wavenumber And Propagation Direction From Limited Synthetic Aperture Radar Data., Gordon E. Carlson
Estimation Of Ocean Wave Wavenumber And Propagation Direction From Limited Synthetic Aperture Radar Data., Gordon E. Carlson
Electrical and Computer Engineering Faculty Research & Creative Works
A method for estimating wavenumber and propagation direction for the dominant wave component in an ocean wave field from a few scans of synthetic aperture radar data is described and analyzed. The use of just a few radar scans rather than a complete image reduces data storage requirements significantly. The analysis shown uses actual synthetic aperture radar data and provides parameter tradeoffs and statistical performance results. While reasonable estimates of wavenumber and propagation direction are achieved in some cases, the estimates are not sufficiently consistent to be satisfactory over a wide range of cases. The primary problem is one of …
The Application Of Bond Graphs To Electrical Machinery And Power Engineering, K. Sirivadhna, Earl F. Richards, Max Darwin Anderson
The Application Of Bond Graphs To Electrical Machinery And Power Engineering, K. Sirivadhna, Earl F. Richards, Max Darwin Anderson
Electrical and Computer Engineering Faculty Research & Creative Works
The bond graph technique, which has been related almost entirely to the field of mechanics, is a modeling procedure where emphasis is placed on the flow of power and energy in a system. Through specific digital simulation programs such as ENPORT IV and V and THTSIM the state space representation, associated output equations and system dynamic response are directly obtainable from the bond graphs. This approach has a great advantage where a complex system is composed of electrical, mechanical, thermal, hydraulic or pneumatic subsystems, such as would exist, for example; in a boiler, turbine, generator exciter system together with its …
Bibliography Of Power Systems Operator Training Resources, Max Darwin Anderson
Bibliography Of Power Systems Operator Training Resources, Max Darwin Anderson
Electrical and Computer Engineering Faculty Research & Creative Works
This paper attempts to provide a current listing of training courses, programs, and resource materials for Power System Operator/Dispatcher training. The training resources are subdivided into five (5) categories: I. Dispatcher training courses and facilities developed by the Suppliers/Manufacturers II. University Short Courses III. Conference Publications IV. Reference Books V. Correspondence Courses A brief description of the offerings of each of Suppliers/Manufacturers is included. Copyright © 1982 by The Institute of Electrical and Electronics Engineers, Inc.
Generalized Running Discrete Transforms, John A. Stuller
Generalized Running Discrete Transforms, John A. Stuller
Electrical and Computer Engineering Faculty Research & Creative Works
This Paper Introduces a Generalized Running Discrete Transform with Respect to Arbitrary Transform Basea, and Relates the Generalized Transform to the Running Discrete Fourier Z and Short-Time Discrete Fourier Transforms. Concepts Associated with the Running and Short-Time Discrete Fourier Transforms Such as 1) Filter Bank Implementation, 2) Synthesis of the Original Sequence by Summation of the Filter Bank Outputs, 3) Frequency Sampling, and 4) Recursive Implementations Are All Extended to the Generalized Transform Case. a Formula is Obtained for Computing the Transform Coefficients of a Segment of Data at Time N Recursively from the Transform Coefficients of the Segment of …
A Performance Study Of 16-Bit Microcomputer-Implemented Eft Algorithms, Paul D. Stigall, Rodger E. Ziemer, L. Hudec
A Performance Study Of 16-Bit Microcomputer-Implemented Eft Algorithms, Paul D. Stigall, Rodger E. Ziemer, L. Hudec
Electrical and Computer Engineering Faculty Research & Creative Works
No abstract provided.
Deposition Of Cdte By Spray Pyrolysis, Jack L. Boone, Thomas P. Van Doren, Alok K. Berry
Deposition Of Cdte By Spray Pyrolysis, Jack L. Boone, Thomas P. Van Doren, Alok K. Berry
Electrical and Computer Engineering Faculty Research & Creative Works
We report the spray pyrolysis of thin films of CdTe which show promise as a base material for solar cell applications. The films predominately show a zinc blende structure and appear to be intrinsic. Microprobe analysis indicates an excess of cadmium but this is not detectable by X-ray diffraction or from electrical conduction measurements. Measurements indicate a nominal direct bandgap of 1.47 eV and an absorption coefficient of the order of 104 cm−1. The room temperature electrical resistivity is of the order of 107 Ω cm.
An Optimal Control Law By Eigenvalue Assignment For Improved Dynamic Stability In Power Systems, A. B.R. Kumar, Earl F. Richards
An Optimal Control Law By Eigenvalue Assignment For Improved Dynamic Stability In Power Systems, A. B.R. Kumar, Earl F. Richards
Electrical and Computer Engineering Faculty Research & Creative Works
No abstract provided.
An Optimal Control Law By Eigenvalue Assignment For Improved Dynamic Stability In Power Systems, A. B.R. Kumar, Earl F. Richards
An Optimal Control Law By Eigenvalue Assignment For Improved Dynamic Stability In Power Systems, A. B.R. Kumar, Earl F. Richards
Electrical and Computer Engineering Faculty Research & Creative Works
Whenever control laws are computed on the basis of linear optimal control theory and implemented on non-linear systems, such as power systems, the performance is not as good as expected because of saturation type non-linearities in the system components. The only way to ensure that a control law is adequate, short of actually testing the real system, is to observe the simulated behavior of the system. Departure between a calculated linear control law and the actual response can be minimized by (a) computing a feedback control law with gains of small magnitudes to achieve a pre-assigned set of eigenvalues for …
An Analytical Method For Quantifying The Electrical Space Heating Component Of A Cold Load Pick Up, Walter W. Lang, Max Darwin Anderson, David R. Fannin
An Analytical Method For Quantifying The Electrical Space Heating Component Of A Cold Load Pick Up, Walter W. Lang, Max Darwin Anderson, David R. Fannin
Electrical and Computer Engineering Faculty Research & Creative Works
After an extended cold weather outage on a distribution circuit supplying a high saturation of electrical space heating, large transient overcurrent's persist for several hours because of the undiversified heating load. In this paper, the electrical space heating component of enduring demand is characterized by a smooth curve. Expressions are derived for the parameters of the curve in terms of the outage conditions and a statistical description of the residences. A method is suggested for using this characterization to determine the effects of a cold load pick up on the distribution circuit components. Copyright © 1982 by The Institute of …
Conversion And Matched Filter Approximations For Serial Minimum-Shift Keyed Modulation, Carl R. Ryan, James H. Stilwell, Rodger E. Ziemer
Conversion And Matched Filter Approximations For Serial Minimum-Shift Keyed Modulation, Carl R. Ryan, James H. Stilwell, Rodger E. Ziemer
Electrical and Computer Engineering Faculty Research & Creative Works
Serial minimum-shift keyed (MSK) modulation, a technique for generating and detecting MSK using series filtering, is ideally suited for high data rate applications provided the required conversion and matched filters can be closely approximated. Low-pass implementations of these filters as parallel inphase-and quadrature-mixer structures are characterized in this paper in terms of signal-to-noise ratio (SNR) degradation from ideal and envelope deviation. Several hardware implementation techniques utilizing microwave devices or lumped elements are presented. Optimization of parameter values results in realizations whose SNR degradation is less than 0.5 dB at error probabilities of 10-6. © 1982 IEEE
Photoluminescence In Spray-Pyrolyzed Cdte, Bernard J. Feldman, J. (Jack) L. Boone, T. (Thomas) Van Doren
Photoluminescence In Spray-Pyrolyzed Cdte, Bernard J. Feldman, J. (Jack) L. Boone, T. (Thomas) Van Doren
Electrical and Computer Engineering Faculty Research & Creative Works
We report very intense photoluminescence in spray-pyrolyzed CdTe at 77 K. We also notice striking similarities in the luminescence spectra, decay, and temperature dependence between CdTe and other thin-film semiconductors, which we interpret in terms of recombination at defect sites in intergranular regions.
A Performance Study Of A Microcomputer-Iimplemented Microcomputer-Implemented Fsk Receiver, Paul D. Stigall, Rodger E. Ziemer, Van T. Pham
A Performance Study Of A Microcomputer-Iimplemented Microcomputer-Implemented Fsk Receiver, Paul D. Stigall, Rodger E. Ziemer, Van T. Pham
Electrical and Computer Engineering Faculty Research & Creative Works
No abstract provided.
High Voltage Powerline Injury Studies, A. Sances, S. J. Larson, J. F. Szablya, J. Derald Morgan, J. B. Myklebust
High Voltage Powerline Injury Studies, A. Sances, S. J. Larson, J. F. Szablya, J. Derald Morgan, J. B. Myklebust
Electrical and Computer Engineering Faculty Research & Creative Works
Current pathways and reconstructions of human injury after contact with distribution powerlines are not well understood. The impedance, currents, and modes of tissue destruction are rarely known. Eight anesthetized hogs, weighing 68 to 90 kg, were used in studies with potentials ranging from 2,100 to 14,400 volts. Electrical contact was made between the hindlimbs, from the hindlimb to forelimb, and over other regions of the body. Currents from 4 to 70 amperes rms and impedances ranging from 130 to 477 ohms were measured. Phase angles up to 40° were observed. Copyright © 1981 by The Institute of Electrical and Electronics …
Verification Of The Kalman Conjecture For Systems Containing Numerator Dynamics, Abdelhamid Djebrane, D. Ronald Fannin
Verification Of The Kalman Conjecture For Systems Containing Numerator Dynamics, Abdelhamid Djebrane, D. Ronald Fannin
Electrical and Computer Engineering Faculty Research & Creative Works
The Kalman conjecture is shown to be true for certain systems of arbitrary order containing numerator dynamics. Simple restrictions on the system parameters are obtained such that the validity of the Kalman conjecture can be easily tested. Copyright © 1981 by The Institute of Electrical and Electronics Engineers. Inc.