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Articles 1 - 30 of 409
Full-Text Articles in Engineering
Optimal Linear Coding For A Multichannel System, Kyong-Hwa Lee
Optimal Linear Coding For A Multichannel System, Kyong-Hwa Lee
Electrical and Computer Engineering ETDs
This paper is concerned with the problem of obtaining the optimal linear vector coding (transformation) method that matches an r-dimensional vector signal and a k-dimensional channel under a given channel power constraint. the encoder converts the r correlated random variables into r independent random variables and selects at most k independent random variables which correspond to the k largest eigenvalues of the signal covarience matrix Q. The encoder reinserts cross-correlation into the k random variables in such a way that the largest eigenvalue of Q is assigned to the smallest eigenvalue of the channel noise covarience matrix R and the …
Optimal And Suboptimal Estimation In Differential Pcm And Adaptive Predictive Coding Systems, Jerry Gibson
Optimal And Suboptimal Estimation In Differential Pcm And Adaptive Predictive Coding Systems, Jerry Gibson
Department of Electrical and Computer Engineering: Faculty Publications
Both differential pulse code modulation (DPCM) and adaptive predictive coding (APC) systems have been used somewhat successfully for low date rate digital voice transmission. A DPCM system has as its goal the removal of signal redundancy prior to transmission by a linear prediction of the incoming signal with a weighted combination of past signal estimates. The error in the prediction process is then quantized and transmitted to the receiver. An identical prediction loop is used at the receiver to reinsert the redundancy, and hence, to reconstruct the speech signal. Both the quantizer and predictor may or may not be adaptive.
Happenings 11 (December 1975-January 1976 Newsletter), College Of Public Affairs And Community Service, University Of Nebraska At Omaha
Happenings 11 (December 1975-January 1976 Newsletter), College Of Public Affairs And Community Service, University Of Nebraska At Omaha
CPACS Newsletters
The College of Public Affairs and Community Service (CPACS) newsletter that reported on the news, collaborations, events, and general happenings of the UNO College of Public Affairs and Community Service. This newsletter has had many names and variations over the years including SPACS Newsletter (1973); Newsletter of the College of Public Affairs and Community Service (1973-1974): Happenings (1974-1980s); and the current e-newsletter titled the CPACS Collective (2021-)
Design Of Film-Substrate Single-Reflection Linear Partial Polarizers, R. M.A. Azzam, A.-R. M. Zaghloul, N. M. Bashara
Design Of Film-Substrate Single-Reflection Linear Partial Polarizers, R. M.A. Azzam, A.-R. M. Zaghloul, N. M. Bashara
Electrical Engineering Faculty Publications
The results of a preceding paper [J. Opt. Soc. Am. 65, 1464,(1975)] are viewed from a different angleas providing the basis for the design of film-substrate single-reflection linear partial polarizers (LPP),which also operate as reflection optical rotators. The important characteristics of a comprehensive set of discrete designs of SiO2-Si LPP’s at λ = 6328 Å are shown graphically.
Polarizer-Surface-Analyzer Null Ellipsometry For Film-Substrate Systems, R. M.A. Azzam, A.-R. M. Zaghloul, N. M. Bashara
Polarizer-Surface-Analyzer Null Ellipsometry For Film-Substrate Systems, R. M.A. Azzam, A.-R. M. Zaghloul, N. M. Bashara
Electrical Engineering Faculty Publications
Single-pass polarizer-surface-analyzer null ellipsometry (PSA-NE) can be used to characterize film-substrate systems, provided that the film thickness lies within one of a set of permissible-thickness bands (PTB). For a transparent film on a transparent or absorbing substrate, the PTB structure consists of a small number of finite-bandwidth bands followed by a continuum band that extends from a film thickness of about half the wavelength of light to infinity. We show that this band structure is a direct consequence of the periodicity of the ellipsometric function ρ (the ratio Rp/Rs, of the complex amplitude-reflection coefficients for …
Anion Grain-Boundary Diffusion In Soidum Chloride, K. S. Sabharwal, J. Mimkes, Manfred Wuttig
Anion Grain-Boundary Diffusion In Soidum Chloride, K. S. Sabharwal, J. Mimkes, Manfred Wuttig
Materials Science and Engineering Faculty Research & Creative Works
The grain-boundary diffusion of 131I in Harshaw pure and Ca-doped NaCl was investigated in the temperature range between 430 and 560°C. The Arrhenius plot of the grain-boundary diffusivity parameter Dδ displays a marked dip at around 510°C. It is proposed that this dip is due to a phase transformation occurring at the grain boundary, possibly calcium segregation.
The New Lead Belt In The Forested Ozarks Of Missouri, Bobby G. Wixson, J. Charles Jennett
The New Lead Belt In The Forested Ozarks Of Missouri, Bobby G. Wixson, J. Charles Jennett
Civil, Architectural and Environmental Engineering Faculty Research & Creative Works
No abstract provided.
Threshold Characteristics Of Multimode Laser Oscillators, Lee W. Casperson
Threshold Characteristics Of Multimode Laser Oscillators, Lee W. Casperson
Electrical and Computer Engineering Faculty Publications and Presentations
The oscillation characteristics of a multimode laser are considered in detail, and for the first time saturation by all of the cavity modes is included. Analytical expressions are obtained for the mode amplitudes, linewidths, and over‐all spectral characteristics of lasers operating above and below threshold. It is found that with increasing excitation the spontaneous emission spectrum is gradually resolved into a set of narrow discrete modes. Slightly above threshold the number of modes reduces in a homogeneoulsy broadened laser until only a single mode is oscillating strongly. The theoretical results are in agreement with experimental data that have been reported …
Solar Heat Capacitors, Taddesse Aregahegn
Evaluation Of Paint-Stripe Beads, Jerry G. Pigman, Kenneth R. Agent
Evaluation Of Paint-Stripe Beads, Jerry G. Pigman, Kenneth R. Agent
Kentucky Transportation Center Research Report
The objectives of this phase of the overall "Roadway Delineation" study were to evaluate the luminosity and durability of several types of glass beads and one type of plastic bead used with paint stripes and to determine their effectiveness during rainy, nighttime conditions. Eleven types of beads were evaluated. They were applied at rates approximating 4, 5, and 6 pounds per gallon (479, 599, and 719 kg/m3). Photometer and visual observations extended to about 9 months after application of test stripes.
The Local Instability Of Thin-Walled Sections Under Combined Compression And Bending, J. Rhodes, James M. Harvey
The Local Instability Of Thin-Walled Sections Under Combined Compression And Bending, J. Rhodes, James M. Harvey
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Proximity Of Contraflexure To Plate Buckling Load, H. H. Spencer, A. C. Walker
Proximity Of Contraflexure To Plate Buckling Load, H. H. Spencer, A. C. Walker
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Load Tests On Steel-Stud Walls, J. F. Mcdermott
Load Tests On Steel-Stud Walls, J. F. Mcdermott
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Local Buckling In Channel Columns, John T. Dewolf
Local Buckling In Channel Columns, John T. Dewolf
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Cold-Forming Residual Stresses Effect On Buckling, Lars Ingvarsson
Cold-Forming Residual Stresses Effect On Buckling, Lars Ingvarsson
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Buckling Of Plates And Beam Sections Under Stress Gradient, Shien T. Wang, Yei L. Tien
Buckling Of Plates And Beam Sections Under Stress Gradient, Shien T. Wang, Yei L. Tien
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Interaction Of Concentrated Load And Bending, George D. Ratliff Jr.
Interaction Of Concentrated Load And Bending, George D. Ratliff Jr.
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Blast-Resistant Design Of Cold-Formed Steel Panels, Albert R. Ammar, George S. Tseng, John J. Healey
Blast-Resistant Design Of Cold-Formed Steel Panels, Albert R. Ammar, George S. Tseng, John J. Healey
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Calculation Of Sheet Steel Diaphragms In The Uk, E. R. Bryan
Calculation Of Sheet Steel Diaphragms In The Uk, E. R. Bryan
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Nonlinear Behavior Of Continuous Cold-Formed Beams, Ken P. Chong, David M. Mosier
Nonlinear Behavior Of Continuous Cold-Formed Beams, Ken P. Chong, David M. Mosier
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Experiments On Trapezoidal Steel Sheets In Bending, Allan Bergfelt, Bo Edlund, Hans Larsson
Experiments On Trapezoidal Steel Sheets In Bending, Allan Bergfelt, Bo Edlund, Hans Larsson
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Failure Of Thin-Walled Members Under Patch Loading, M. Elgaaly
Failure Of Thin-Walled Members Under Patch Loading, M. Elgaaly
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Postbuckling Behaviour Of A Webplate Under Partial Edge Loading, Debal K. Bagchi, K. C. Rockey
Postbuckling Behaviour Of A Webplate Under Partial Edge Loading, Debal K. Bagchi, K. C. Rockey
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
The Shear Flexibility Of Corrugated Steel Sheeting, R. M. Lawson, J. Michael Davies
The Shear Flexibility Of Corrugated Steel Sheeting, R. M. Lawson, J. Michael Davies
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Stressed Skin Construction In The Uk, E. R. Bryan, J. Michael Davies
Stressed Skin Construction In The Uk, E. R. Bryan, J. Michael Davies
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Sheet Metal Panels For Use In Construction, Rolf Baehre
Sheet Metal Panels For Use In Construction, Rolf Baehre
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Progress Report On Cold-Formed Steel Purlin Design, Teoman Pekoz
Progress Report On Cold-Formed Steel Purlin Design, Teoman Pekoz
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
The Performance Of Cold-Formed Steel Products In Housing, Larry W. Ife
The Performance Of Cold-Formed Steel Products In Housing, Larry W. Ife
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.
Design Vs. Test Results For Steel Deck Floor Slabs, Max L. Porter, C. E. Ekberg Jr.
Design Vs. Test Results For Steel Deck Floor Slabs, Max L. Porter, C. E. Ekberg Jr.
CCFSS Proceedings of International Specialty Conference on Cold-Formed Steel Structures (1971 - 2018)
No abstract provided.