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1984
Sunday, January 1st
12:00 AM

A New Parabolic Approximation to the Helmholtz Equation

Section: Scattering

J. Corones, Iowa State University
R. Dougherty, Iowa State University
H. McMaken, Iowa State University

Santa Cruz, CA

12:00 AM

A Theoretical Model of Ultrasonic Examination of Smooth Flat Cracks

Section: Scattering

R. K. Chapman, CEGB NDT Application Centre
J. M. Coffey, CEGB NDT Application Centre

Santa Cruz, CA

12:00 AM

Absolute Magnitude of Front Surface Reflections in Ultrasonic Measurements

Section: Signal Processing

Donald O. Thompson, Iowa State University
S. J. Wormley, Iowa State University

Santa Cruz, CA

12:00 AM

Application of Diffraction Corrections to the Absolute Measurement of Scattering Amplitudes

Section: Signal Processing

R.Bruce Thompson, Iowa State University
Timothy A. Gray, Iowa State University

Santa Cruz, CA

12:00 AM

Application of Multiple Scattering Theory to Sub-Surface Defects

Section: Scattering

E. Domany, Weizmann Institute of Science
O. Entin-Wohlman, Tel Aviv University

Santa Cruz, CA

12:00 AM

ARMA Processing for NDE Ultrasonic Imaging

Section: Imaging and Reconstruction

Yoh-Han Pao, Case Western Reserve University
Ahmed El-Sherbini, Case Western Reserve University

Santa Cruz, CA

12:00 AM

Comparison of Scattering Amplitudes from Various Transducers Using Diffraction and Attenuation Corrections

Section: Transducers

S. J. Wormley, Iowa State University
Donald O. Thompson, Iowa State University

Santa Cruz, CA

12:00 AM

Crack Characterisation in Turbine Disks

Section: Scattering

Leonard J. Bond, University College London
N. Saffari, University College London

Santa Cruz, CA

12:00 AM

Crack-Tip Diffraction in a Transversely Isotropic Solid

Section: Scattering

A. N. Norris, Northwestern University
J. D. Achenbach, Northwestern University

Santa Cruz, CA

12:00 AM

Development of a Quantitative Flaw Characterization Module — A Status Report

Section: Sizing

George J. Gruber, Southwest Research Institute
Gary J. Hendrix, Southwest Research Institute
Theodore A. Mueller, Southwest Research Institute

Santa Cruz, CA

12:00 AM

Effects of Deconvolution Procedures on Size Estimates in the Born Inversion Algorithm

Section: Signal Processing

P. K. Bhagat, Air Force Wright Aeronautical Laboratories
Dale E. Chimenti, Air Force Wright Aeronautical Laboratories
T. J. Moran, Air Force Wright Aeronautical Laboratories
K. D. Shimmin, Air Force Wright Aeronautical Laboratories

Santa Cruz, CA

12:00 AM

Experimental Results on Crack Inversion

Section: Sizing

L. Ahlberg, Rockwell International Science Center
B. R. Tittmann, Rockwell International Science Center
A. N. Norris, Northwestern University
J. D. Achenbach, Northwestern University

Santa Cruz, CA

12:00 AM

Further Results for Crack-Edge Mappings by Ray Methods

Section: Sizing

A. N. Norris, Northwestern University
J. D. Achenbach, Northwestern University
L. Ahlberg, Rockwell International Science Center
B. R. Tittmann, Rockwell International Science Center

Santa Cruz, CA

12:00 AM

High-Resolution Imaging of Thick Sections and Specimens with Irregular Surfaces Using Scanned Acoustical Holography

Section: Imaging and Reconstruction

Paul M. Gammell, Sigma Research, Incorporated
Victor I. Neeley, VinTek, Incorporated
Walter R. Park, Sigma Research, Incorporated
Larry D. Reid, Sigma Research, Incorporated

Santa Cruz, CA

12:00 AM

Homomorphic Processing in Ultrasonic NDE

Section: Signal Processing

P. K. Bhagat, Air Force Wright Aeronautical Laboratories
K. D. Shimmin, Air Force Wright Aeronautical Laboratories

Santa Cruz, CA

12:00 AM

Interactions of Simulated Partially Closed Cracks with Acoustic Waves

Section: Scattering

O. Buck, Iowa State University
C. J. Fiedler, Iowa State University
L. K. Reed, Iowa State University
K. M. Lakin, Iowa State University
R. Bruce Thompson, Iowa State University

Santa Cruz, CA

12:00 AM

Laser-Induced Interior Cracks for Ultrasonic NDE

Section: Sizing

David K. Hsu, Colorado State University
C. Y. She, Colorado State University
Yuhua Li, Colorado State University

Santa Cruz, CA

12:00 AM

Localization and Size Estimation of Cylindrical Flaws

Section: Imaging and Reconstruction

Akira Umeda, National Research Laboratory of Metrology
Namiteru Hida, National Research Laboratory of Metrology

Santa Cruz, CA

12:00 AM

Measurement of Surface Machining Damage in Ceramics

Section: Scattering

B. T. Khuri-Yakub, Stanford University
Y. Shui, Stanford University
G. S. Kino, Stanford University
D. B. Marshall, Stanford University
A. G. Evans, Stanford University

Santa Cruz, CA

12:00 AM

Mechanically Assembled Non-Bonded Transducers Utilizing PVDF Film

Section: Transducers

J. M. Eoff, Rockwell International

Santa Cruz, CA

12:00 AM

New Multitransducer Techniques for Crack Characterisation

Section: Sizing

Leonard J. Bond, University College London
M. Punjani, University College London

Santa Cruz, CA

12:00 AM

Novel Approaches to Broadband Transducer Design

Section: Transducers

W. D. Jolly, Southwest Research Institute
D. J. Reed, Southwest Research Institute

Santa Cruz, CA

12:00 AM

Polynomial Extrapolation Toward Low Frequencies of the Spectrum of Gated Ultrasonic Echoes for Deconvolution: Application to Defects in Solids

Section: Signal Processing

F. Cohen-Tenoudji, G.P.S. Universite Paris VII
Y. Pralus, C.E.T.I.M.
A. Lambert, C.E.T.I.M.
G. Quentin, C.E.T.I.M.
B. R. Tittmann, Rockwell International

Santa Cruz, CA

12:00 AM

Resonances and Surface Waves in Elastic Wave Scattering from Cavities and Inclusions

Section: Scattering

P. P. Delsanto, University of Puerto Rico
J. D. Alemar, University of Puerto Rico
E. Rosario, University of Puerto Rico
J. V. Subrahmanyam, Catholic University of America
A. Nagl, Catholic University of America
H. Uberall, Catholic University of America
J. R. Valcarel, Catholic University of America

Santa Cruz, CA

12:00 AM

Saw NDE Techniques for Monitoring the Growth Behavior of Small Surface Fatigue Cracks

Section: Scattering

M. T. Resch, Stanford University
B. D. London, Stanford University
G. F. Ramusat, Stanford University
H. H. Yuce, O.N.E.R.A.
D. V. Nelson, O.N.E.R.A.
J. C. Shyne, Stanford University

Santa Cruz, CA

12:00 AM

Scattering of Elastic Waves by Inclined Subsurface Cracks

Section: Scattering

Vasundara V. Varadan, The Pennsylvania State University
Sheng-Ju Tsao, The Pennsylvania State University
Vijay K. Varadan, The Pennsylvania State University

Santa Cruz, CA

12:00 AM

Scattering Of Obliquely Incident Rayleigh Waves by a Surface-Breaking Crack

Section: Scattering

Y. C. Angel, Northwestern University
J. D. Achenbach, Northwestern University
A. N. Norris, Northwestern University

Santa Cruz, CA

12:00 AM

Scattering of Rayleigh Surface Waves from Partly-Closed Surface-Breaking Cracks

Section: Scattering

William Visscher, Los Alamos National Laboratory

Santa Cruz, CA

12:00 AM

Sizing Defects Using Annular Array Techniques with an Automatic Ultrasonic Data Acquisition System

Section: Imaging and Reconstruction

J. H. Gieske, Sandia National Laboratories
G. C. Stoker, Sandia National Laboratories
P. D. Walkington, Sandia National Laboratories

Santa Cruz, CA

12:00 AM

Specular Reflection by Contacting Crack Faces

Section: Scattering

J. D. Achenbach, Northwestern University
A. N. Norris, Northwestern University

Santa Cruz, CA

12:00 AM

Statistical Flaw Detection: Application to Flaws Below Curved Surfaces

Section: Probability of Detection

R. K. Elsley, Rockwell International Science Center
K. W. Fertig, Rockwell International Science Center
J. M. Richardson, Rockwell International Science Center
R. S. Linebarger, Rockwell International Science Center

Santa Cruz, CA

12:00 AM

Statistical Flaw Detection: Theory

Section: Probability of Detection

K. W. Fertig, Rockwell International Science Center
J. M. Richardson, Rockwell International Science Center
R. K. Elsley, Rockwell International Science Center

Santa Cruz, CA

12:00 AM

Surface Acoustic Wave Studies of Surface Cracks in Ceramics

Section: Scattering

A. Fahr, Ontario Research Foundation
S. Johar, Ontario Research Foundation
M. K. Murthy, Ontario Research Foundation
W. R. Sturrock, Defence Research Establishment

Santa Cruz, CA

12:00 AM

The Effects of Crack Closure on Ultrasonic Scattering Measurements

Section: Scattering

Donald O. Thompson, Iowa State University
Dale E. Chimenti, Iowa State University

Santa Cruz, CA

12:00 AM

Ultrasonic Detection of Cracks in Web Geometries

Section: Probability of Detection

Timothy A. Gray, Iowa State University
R. Bruce Thompson, Iowa State University

Santa Cruz, CA

12:00 AM

Ultrasonic Imaging Analysis of Component Integrity

Section: Imaging and Reconstruction

M. C. Tsao, NDT Technology Development
R. H. Grills, NDT Technology Development
R. P. Simpson, NDT Technology Development

Santa Cruz, CA

12:00 AM

Ultrasonic Microstructural Noise Parameters in a Powder Metal Alloy

Section: Probability of Detection

B. R. Tittmann, Rockwell International Science Center
L. A. Ahlberg, Rockwell International Science Center
K. W. Fertig, Rockwell International Science Center

Santa Cruz, CA

12:00 AM

Ultrasonic Sizing of Cracks in Web Geometries

Section: Sizing

Timothy A. Gray, Iowa State University
R.Bruce Thompson, Iowa State University

Santa Cruz, CA

12:00 AM

Visualization of Surface-Breaking Flaws by Shadow Imaging

Section: Imaging and Reconstruction

D. K. Peterson, Stanford University
S. D. Bennett, Stanford University
G. S. Kino, Stanford University

Santa Cruz, CA

12:00 AM