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1992
Wednesday, January 1st
12:00 AM

A Hybrid Finite Element/Method of Moment Formulation for Single Frequency Eddy-Current Inversion

Section: Imaging and Inversion Techniques

Margaret G. Wismer, Worcster Polytechnic Institute
Reinhold Ludwig, Worcester Polytechnic Institute

Brunswick, ME

12:00 AM

A Neural Network Approach for Solving Inverse Problems in NDE

Section: Neural Networks

I. Elshafiey, Iowa State University
Lalita Udpa, Iowa State University
Satish Udpa, Iowa State University

Brunswick, ME

12:00 AM

A True Wiener Filter Implementation for Improving Signal to Noise and Resolution in Acoustic Images

Section: Signal Processing

K. W. Mitchell, General Electric
R. S. Gilmore, General Electric

Brunswick, ME

12:00 AM

Acoustic Emissions Applications on the Nasa Space Station

Section: Neural Networks

M. A. Friesel, Pacific Northwest Laboratory
R. S. Barga, Pacific Northwest Laboratory
J. F. Dawson, Pacific Northwest Laboratory
P. H. Hutton, Pacific Northwest Laboratory
R. J. Kurtz, Pacific Northwest Laboratory
D. K. Lemon, Pacific Northwest Laboratory

Brunswick, ME

12:00 AM

Application of Critical Angle Imaging to the Characterization of Cast Stainless Steels

Section: Imaging and Inversion Techniques

B. P. Hildebrand, Battelle Memorial Institute
M. S. Good, Battelle Memorial Institute
A. A. Diaz, Battelle Memorial Institute
E. R. Green, Battelle Memorial Institute

Brunswick, ME

12:00 AM

Application of High Resolution Inversion of Ultrasonic Data to the Imaging of Multi-Layered Composite Structures

Section: Imaging and Inversion Techniques

Kenneth I. McRae, Canadian Department of National Defence

Brunswick, ME

12:00 AM

Application of Two-Dimensional Matched Filters to X-Ray Radiographic Flaw Detection and Enhancement

Section: Signal Processing

R. Mark Wallingford, Iowa State University
E. M. Siwek, Iowa State University
Joseph N. Gray, Iowa State University

Brunswick, ME

12:00 AM

Characterization of Materials Using Grain Backscattered Ultrasonic Signals

Section: Signal Processing

Myung-Hyun Yoon, Iowa State University
Tenkasi V. Ramabadran, Iowa State University

Brunswick, ME

12:00 AM

Coherent Flaw Reflectivity Estimation in Nonstationary Noise

Section: Signal Processing

Kevin D. Donohue, University of Kentucky
John M. Bressler, Drexel University

Brunswick, ME

12:00 AM

Comparison of Neural Network and Markov Random Field Image Segmentation Techniques*

Section: Neural Networks

Fred G. Smith, McDonnel Aircraft Company
Karen R. Jepsen, McDonnell Aircraft Company
Peter F. Lichtenwalner, McDonnell Aircraft Company

Brunswick, ME

12:00 AM

Cross Correlation of Eddy Current Images for Detection of Fatigue Crack Propagation

Section: Imaging and Inversion Techniques

R. H. Moore, American Research Corporation of Virginia
J. M. Glass, American Research Corporation of Virginia
H. P. Groger, American Research Corporation of Virginia
R. J. Churchill, American Research Corporation of Virginia

Brunswick, ME

12:00 AM

Error Analysis and Ultrasonic Scattering Amplitude Estimation Using the Wiener Filter with Limited Prior Information

Section: Signal Processing

Steven P. Neal, University of Missouri–Columbia
Paul L. Speckman, University of Missouri–Columbia
Michael A. Enright, University of Missouri–Columbia

Brunswick, ME

12:00 AM

Fast Pattern Recognition Method for Eddy Current Testing

Section: Signal Processing

K. Grotz, Institut Dr. Foerster
T. W. Guettinger, Institut Dr. Foerster

Brunswick, ME

12:00 AM

Flaw Characterization and Sizing Using Sensitivity Analysis and the Boundary Element Method

Section: Imaging and Inversion Techniques

Daniel A. Tortorelli, University of Illinois at Urbana-Champaign
Zi-Xian Wang, University of Illinois at Urbana-Champaign
Guna Krishnasamy, PDA Engineering

Brunswick, ME

12:00 AM

Graphite Epoxy Defect Classification of Ultrasonic Signatures Using Statistical and Neural Network Techniques

Section: Neural Networks

L. M. Brown, David Taylor Research Center
R. W. Newman, Johns Hopkins University
R. DeNale, David Taylor Research Center
C. A. Lebowitz, David Taylor Research Center
F. G. Arcella, Johns Hopkins University

Brunswick, ME

12:00 AM

Hybrid Lossless-Lossy Compression of Industrial Radiographs

Section: Imaging and Inversion Techniques

Ajai Narayan, Iowa State University
Tenkasi V. Ramabadran, Iowa State University

Brunswick, ME

12:00 AM

IDA: An Architecture for an Intelligent Design Assistant for Assessing the Inspectability of Structures from a Description of Their Geometry

Section: Neural Networks

Stephen M. Nugen, Iowa State University
Babak Forouraghi, Iowa State University
Lester W. Schmerr Jr., Iowa State University

Brunswick, ME

12:00 AM

Imaging Flaws in Thin Metal Plates Using a Magneto-Optic Device

Section: Imaging and Inversion Techniques

B. Wincheski, National Aeronautics and Space Administration
D. R. Prabhu, National Aeronautics and Space Administration
M. Namkung, AS&M, Inc.
E. A. Birt, National Aeronautics and Space Administration

Brunswick, ME

12:00 AM

Influence of Filtering Techniques on Holographic Images

Section: Signal Processing

V. van Bernus, Siemens AG
F. Mohr, Siemens AG
R. Reimann, Siemens AG
H. Schober, Siemens AG
T. Schmeidl, Seimens AG

Brunswick, ME

12:00 AM

Limited Data Tomography Using Support Minimization with a Priori Data

Section: Imaging and Inversion Techniques

Ronald A. Roberts, Iowa State University

Brunswick, ME

12:00 AM

Microstructure Characterizations in Composite Media Using Ultrasonic Tomography

Section: Imaging and Inversion Techniques

Ronald A. Kline, University of Oklahoma
Yu-Qin Wang, University of Oklahoma

Brunswick, ME

12:00 AM

Neural Network for Crack-Depth Determination from Ultrasonic Backscattering Dat

Section: Neural Networks

M. Kitahara, Tokai University
J. D. Achenbach, Northwestern University
Q. C. Guo, Northwestern University
M. L. Peterson, Northwestern University
M. Notake, Mitsubishi Research Institute
M. Takadoya, Mitsubishi Research Institute

Brunswick, ME

12:00 AM

New Training Algorithm for Neural Networks

Section: Neural Networks

Joseph C. Chow, Iowa State University
Lalita Udpa, Iowa State University
Satish Udpa, Iowa State University

Brunswick, ME

12:00 AM

On the Use of Wigner Distribution in Ultrasonic NDE

Section: Signal Processing

C. H. Chen, University of Massachusetts Dartmouth
J. C. Guey, Purdue University

Brunswick, ME

12:00 AM

Phase Shift Determination of Scattered Far-Fields and its Application to an Inverse Problem

Section: Imaging and Inversion Techniques

M. Kitahara, Tokai University
K. Nakagawa, Total System Institute

Brunswick, ME

12:00 AM

Polarimetric Microwave Inverse Scattering as Applied to Nondestructive Testing

Section: Imaging and Inversion Techniques

M. Brandfaß, University of Kassel
K. J. Langenberg, University of Kassel

Brunswick, ME

12:00 AM

Radiographic Image Enhancement by Wiener Decorrelation

Section: Imaging and Inversion Techniques

Zane W. Bell, Martin Marietta Energy Systems, Inc.
B. W. Godfrey, Martin Marietta Energy Systems, Inc.

Brunswick, ME

12:00 AM

Rank Determination of Order Statistic Filters for Ultrasonic Flaw Detection

Section: Signal Processing

Xing Liu, Drexel University
Jian-qiang Xin, Drexel University
Kevin Donohue, Drexel University
Nihat M. Bilgutay, Drexel University

Brunswick, ME

12:00 AM

Real-Time B-Scan Ultrasonic Imaging Using a Digital Phased Array System for NDE

Section: Imaging and Inversion Techniques

Robert Dunki-Jacobs, General Electric Company
Lewis Thomas, General Electric Company

Brunswick, ME

12:00 AM

Reconstruction of Internal Density Distributions in Porous Bodies from Laser Ultrasonic Data

Section: Imaging and Inversion Techniques

Yichi Lu, University of Virginia
Jeffrey A. Goldman, University of Virginia
Haydn N. G. Wadley, University of Virginia

Brunswick, ME

12:00 AM

Split Spectrum Processing with Computationally Efficient Sinusoidal Fir Filters

Section: Signal Processing

Orlando J. Canelones, University of Dayton
Prasanna Karpur, University of Dayton

Brunswick, ME

12:00 AM

Split Spectrum Technique as a Preprocessor for Ultrasonic Nondestructive Evaluation

Section: Signal Processing

Prasanna Karpur, University of Dayton

Brunswick, ME

12:00 AM

Study of Microstructural Characteristics Using Mathematical Morphology

Section: Signal Processing

Matthew S. Chackalackal, Iowa State University
John P. Basart, Iowa State University

Brunswick, ME

12:00 AM

Temporal Leakage and Its Effects on Resolution in Deconvolution of Ultrasonic Signals

Section: Signal Processing

M. S. O'Brien, University of Toronto
S. M. Kramer, Ontario Hydro

Brunswick, ME

12:00 AM

The Use of Phase Quadrature Information for the Automated Detection and Classification of Defects in the Presence of Deterministic Noise

Section: Neural Networks

Donald L. Birx, Systems Research Laboratories
Stephen J. Pipenberg, Systems Research Laboratories

Brunswick, ME

12:00 AM

Time Delay Neural Networks for Classification of Ultrasonic NDT Signals

Section: Neural Networks

K. Shahani, Iowa State University
Lalita Udpa, Iowa State University
Satish Udpa, Iowa State University

Brunswick, ME

12:00 AM

Ultrasonic Equivalent Flaw Sizing - A Time-of-Flight Approach

Section: Imaging and Inversion Techniques

Sung-Jin Song, Iowa State University
Lester W. Schmerr Jr., Iowa State University

Brunswick, ME

12:00 AM

Ultrasonic Flaw Classification Using a Quasi-Pulse-Echo Technique

Section: Imaging and Inversion Techniques

Chien-Ping Chiou, Iowa State University
Lester W. Schmerr Jr., Iowa State University

Brunswick, ME

12:00 AM

Ultrasonic Signal Enhancement Using Order Statistic and Morphological Filters

Section: Signal Processing

M. A. Mohamed, Illinois Institute of Technology
J. Saniie, Illinois Institute of Technology

Brunswick, ME

12:00 AM

Ultrasonic Signal Processing of Adhesive Bonding Data Employing Chirp-Z Transform and Adaptive Filtering Techniques

Section: Signal Processing

V. K. Nair, Worcester Polytechnic Institute
R. Ludwig, Worcester Polytechnic Institute
J. M. Sullivan, Worcester Polytechnic Institute
D. Dai, Worcester Polytechnic Institute

Brunswick, ME

12:00 AM

Ultrasonic Sizing of Voids Using Area Functions

Section: Imaging and Inversion Techniques

J. Yang, University College London
Leonard J. Bond, National Institute of Standards and Technology

Brunswick, ME

12:00 AM

Ultrasonic Synthetic-Aperture Holographic Imaging†

Section: Imaging and Inversion Techniques

Richard Y. Chiao, General Electric Company
Robert S. Gilmore, General Electric Company
Thomas G. Kincaid, Signametrics

Brunswick, ME

12:00 AM