1. Varghese, B., R. Zoughi, M. Velez and R. Moore, "Refractory Wall Thickness Measurement Using Time-Domain Reflectometry at Microwave Frequencies," Proceedings of the Thirty-Ninth Symposium on Refractories, The American Ceramics Society, St. Louis, MO, April 9-10, 2003.
2. Zoughi, R., J. Lai and K. Monuz, "A Brief Review of Microwave Inspection of Stratified Composite Structures: A Comparison Between Plane-Wave and Near-Field Approaches," Materials Evaluation, vol. 60, no. 2, pp. 171-177, February 2002.
3. Qaddoumi, N., T. Bigelow, R. Zoughi, L. Brown and M. Novack, "Reduction of Sensitivity to Surface Roughness and Slight Standoff Distance Variations in Microwave Inspection of Thick Composite Structures," Materials Evaluation, vol. 60, no. 2, pp. 165-170, February 2002.
4. Qaddoumi, N. and R. Zoughi, "Preliminary Study of the Influences of Effective Dielectric Constant and Non-Uniform Probe Aperture Field Distribution on Near-Field Microwave Images," Materials Evaluation, vol. 55, no. 10, pp. 1169-1173, October, 1997.
5. Ranu, E. and R. Zoughi, "Near-Field Microwave Nondestructive Distinction Between Surface Height Variations and Defects in Thick Sandwich Composites Using Standoff Distance Optimization," Nondestructive Testing & Evaluation, vol. 13, pp. 215-225, 1997.
6. Gray, S. and R. Zoughi, "Dielectric Sheet Thickness Variation and Disbond Detection in Multi-Layered Composites Using an Extremely Sensitive Microwave Approach," Materials Evaluation, vol. 55, no. 1, pp. 42-48, 1997.
7. Qaddoumi, N., R. Zoughi and G.W. Carriveau, "Microwave Detection and Depth Determination of Disbonds in Low-Permittivity and Low-Loss Thick Sandwich Composites," Research in Nondestructive Evaluation, vol. 8, no. 1, pp. 51-63, 1996.
8. Qaddoumi, N., S. Ganchev and R. Zoughi, "Microwave Diagnosis of Low Density Glass Fibers with Resin Binder," Research in Nondestructive Evaluation, vol. 8, no. 3, pp. 177-188, 1996.
9. Bakhtiari, S., S. Ganchev and R. Zoughi, "A Generalized Formulation for Admittance of an Open-Ended Rectangular Waveguide Radiating into Stratified Dielectrics," Research in Nondestructive Evaluation, vol. 7, no. 2/3, pp. 75-87, 1995.
10. Ganchev, S., N. Qaddoumi, S. Bakhtiari and R. Zoughi, "Calibration and Measurement of Dielectric Properties of Finite Thickness Composite Sheets with Open-Ended Coaxial Sensors," IEEE Transactions on Instrumentation and Measurement, vol. IM-44, no. 6, p. 1023-1029, December, 1995.
11. Qaddoumi, N., S.I. Ganchev, G. Carriveau and R. Zoughi, "Microwave Imaging of Thick Composites with Defects," Materials Evaluation, vol. 53, no. 8, pp. 926-929, August, 1995.
12. Ganchev, S., N. Qaddoumi, E. Ranu and R. Zoughi, "Microwave Detection Optimization of Disbond in Layered Dielectrics with Varying Thicknesses," IEEE Transactions on Instrumentation and Measurement, vol. IM-44, no. 2, pp. 326-328, April, 1995.
13. Gray, S., S. Ganchev, N. Qaddoumi, G. Beauregard, D. Radford and R. Zoughi, "Porosity Level Estimation in Polymer Composites Using Microwaves," Materials Evaluation, vol. 53, no. 3, pp. 404-408, March, 1995.
14. Qaddoumi, N. and R. Zoughi, "Microwave Scattering Characteristics of Defective Dielectric Cylinders," NDT&E International, vol. 27, no. 6, pp. 299-305, 1994.
15. Bakhtiari, S., S. Ganchev and R. Zoughi, "Analysis of the Radiation of an Open-Ended Coaxial Line into Stratified Dielectrics," IEEE Transactions on Microwave Theory and Techniques, vol. 42, no. 7, pp. 1261-1267, July, 1994.
16. Bakhtiari, S., S. Ganchev, N. Qaddoumi and R. Zoughi, "Microwave Non-Contact Examination of Disbond and Thickness Variation in Stratified Composite Media," IEEE Transactions on Microwave Theory and Techniques, vol. 42, no. 3, pp. 389-395, March, 1994.
17. Edwards, J. and R. Zoughi, "Microwave Sensitivity Maximization of Disbond Characterization in Conductor Backed Dielectric Composites," Journal of Nondestructive Evaluation, vol. 12, no. 3, pp. 193-198, September, 1993.
18. Bakhtiari, S., S. Ganchev and R. Zoughi, "Microwave Frequency Optimization for Accurate Thickness or Dielectric Property Monitoring of Conductor Backed Composites," Materials Evaluation, vol. 51, no. 6, pp. 740-743, June, 1993.
19. Bakhtiari, S., S. Ganchev and R. Zoughi, "Open-Ended Rectangular Waveguide for Nondestructive Thickness Measurement and Variation Detection of Lossy Dielectric Slabs Backed by a Conducting Plate," IEEE Transactions on Instrumentation and Measurement, vol. 42, no. 1, pp. 19-24, February, 1993.
20. Ganchev, S., S. Bakhtiari and R. Zoughi, "A Novel Numerical Technique for Dielectric Measurement of Lossy Dielectrics," IEEE Transactions on Instrumentation and Measurement, vol. IM-41, no. 3, pp. 361-365, June, 1992.
21. Zoughi, R., J. Edwards and S. Bakhtiari, "Swept Microwave Frequency Nondestructive Detection and Evaluation of Delamination in Stratified Dielectric Media," Journal of Wave-Material Interaction, vol. 7, no. 1, pp. 427-438, January, 1992.
22. Zoughi, R. and S. Bakhtiari, "Microwave Nondestructive Detection and Evaluation of Void in Layered Dielectric Slabs," Research in Nondestructive Evaluation, vol. 2, no. 4, pp. 195-205, 1990.
23. Bakhtiari, S., and R. Zoughi, "Microwave Thickness Measurement of Lossy Layered Dielectric Slabs Using Incoherent Reflectivity," Research in Nondestructive Evaluation, vol. 2, no. 3, pp. 157-168, 1990.
24. Zoughi, R. and S. Bakhtiari, "Microwave Nondestructive Detection and Evaluation of Disbonding and Delamination in Layered-Dielectric-Slabs," IEEE Transactions on Instrumentation and Measurement, vol. 39, no. 6, pp. 1059-1063, December, 1990.
25. Zoughi, R. and M. Lujan, "Nondestructive Microwave Thickness Measurement of Dielectric Slabs," Materials Evaluation, vol. 48, no. 9, pp. 1100-1105, September, 1990.
26. Carriveau, G. and R. Zoughi, "Nondestructive Evaluation and Characterization of Complex Composite Structures," Proceedings of the Eleventh International Symposium on Nondestructive Characterization of Materials (Organized by Johns Hopkins University Center for Nondestructive Evaluation), pp. , Berlin, Germany, June 24- 28, 2002.
27. Carriveau, G., D. Hughes, N. Qaddoumi and R. Zoughi, "Microwave Nondestructive Evaluation and Characterization of Tank Inner-Liners," Proceedings of the Eleventh International Symposium on Nondestructive Characterization of Materials (Organized by Johns Hopkins University Center for Nondestructive Evaluation), pp. , Berlin, Germany, June 24- 28, 2002.
28. Muñoz, K., C. Behrens, and R. Zoughi, "Potential Capabilities of Microwave NDE Methods for Interrogation of Thermal Barrier Coatings," Proceedings of the Eleventh International Symposium on Nondestructive Characterization of Materials (Organized by Johns Hopkins University Center for Nondestructive Evaluation), pp. , Berlin, Germany, June 24- 28, 2002.
29. Hughes, D., C. Behrens and R. Zoughi, "Investigation of Potential Use of Combined Microwave Near-Field and Modulated Scattering Techniques (MST) for Detection of Delamination due to Impact Damage in Multi-Layered Glass Fiber Reinforced Polymer Composite Structures," To appear in the Proceedings of the Twenty-eighth Annual Review of Progress in Quantitative Nondestructive Evaluation, vol. 21, Brunswick, Maine, July 29-August 3, 2001.
30. Hughes, D., M. Kazemi, J. Myers, R. Zoughi and T. Nanni, "Microwave detection of Delamination between Fiber Reinforced Polymer (FRP) Composites and Concrete Substrate," To appear in the Proceedings of the Twenty-eighth Annual Review of Progress in Quantitative Nondestructive Evaluation, vol. 21, Brunswick, Maine, July 29-August 3, 2001.
31. Greenawald, E.C., L.J. Levenberry, N. Qaddoumi, A. McHardy, R. Zoughi and C.F. Poranski, "Microwave NDE of Impact Damaged Fiberglass and Elastomer Layered Composites," Proceedings of the Twenty-sixth Annual Review of Progress in Quantitative Nondestructive Evaluation, vol. 19B, pp. 1263-1268, Montreal, Quebec, Canada, July 25-30, 1999.
32. Frank, M.D., L. Handjojo, N. Qaddoumi and R. Zoughi, "Determination of Anisotropy in Glass Fibers Using Polarization of Microwave Fields," Proceedings of the Ninth International Symposium on Nondestructive Characterization of Materials (Organized by Johns Hopkins University Center for Nondestructive Evaluation), pp. 57-62, Sydney, Australia, June 28- July 2, 1999.
33. Brown, L.M., J.J. DeLoach, N. Qaddoumi and R. Zoughi, "An Overview of Microwave Inspection of Naval Multi-Layered Composites," Proceedings of the Third Pacific Rim International Conference on Advanced Materials and Processing, Hawaii, pp. 1667-2672, July 12-16, 1998.
34. Easter, J., N. Qaddoumi, R. Zoughi, L. Brown and J. DeLoach, " Preliminary Results of Detecting and Locating Defects Under Triangular Thick Composite Structural Members," Proceedings of the SPIE Symposium on Nondestructive Evaluation Techniques for Aging Infrastructure Manufacturing, vol. 3396, pp. 129-134, San Antonio, TX, March 1998.
35. Brown, L.M., J.J. DeLoach, R. Zoughi and E. Ranu, "Preliminary Evaluation of Microwave Techniques for Inspection of Thick Layered Composite Deck Joint," Proceedings of The Eighth International Symposium on Nondestructive Characterization of Materials, vol. VIII, pp. 305-310, Boulder, CO, June 15-20, 1997.
36. Lebowitz, C., R. Zoughi, J.W.M. Spicer and R. Osiander, "Comparison of Ultrasonic, Microwave and Photothermal Imaging of Defective Graphite-Epoxy Composite Panels," Proceedings of SPIE Symposium, Nondestructive Evaluation Techniques for Aging Infrastructure & Manufacturing Conferences, vol. 2944, pp. 67-74, Scottsdale, AZ, December 2-5, 1996.
37. Qaddoumi, N., H. Abiri, S. Ganchev and R. Zoughi, "Near-Field Analysis of Rectangular Waveguide Probes Used for Imaging," Proceedings of the Review of Progress in Quantitative NDE, vol. 15A, pp. 727-732, Plenum Press, NY, 1995.
38. Zoughi, R. and C. Lebowitz and S. Lukes, "Preliminary Evaluation of the Potential and Limitations of Microwave NDI Methods for Inspecting Graphite Composites," Proceedings of the Seventh International Symposium on Nondestructive Characterization of Materials, vol. 210-213, part 2, pp. 611-618, Prague, Czech Republic, June 19-23, 1995.
39. Zoughi, R., S. Ganchev, G. Carriveau and N. Qaddoumi, "Microwave Detection of Defects in Thick Multi-Laminate Sandwich Composite Structures," ASNT Spring'95 Conference Paper Summaries , pp. 191-193, Las Vegas, NV, March 20-24, 1995.
40. Zoughi, R., S. Ganchev and G. Carriveau, "Microwave Nondestructive Testing: Narrow Disbond Detection and Adhesive Thickness and Composition Monitoring," Proceedings of the Joint Army-Navy-NASA-Air Force (JANNAF) Nondestructive Evaluation Subcommittee and Structures and Mechanical Behavior Subcommittee Meeting, pp. 69-75, Hill AFB, Utah, October 24-28, 1994.
41. Zoughi, R., S. Ganchev and G. Carriveau, "Microwave Nondestructive Testing and Evaluation of Thick Composites," Gordon Research Conference on Nondestructive Evaluation: "Noninvasive Sensing of Materials During Processing", Henniker, New Hampshire, June 26-July 1, 1994.
42. Radford, D.W., B.W. Barber, S. Ganchev and R. Zoughi, "Microwave Nondestructive Evaluation of Glass Fiber/Epoxy Composites Subjected to Impact Fatigue," Proceedings of SPIE Symposium, Advanced Microwave and Millimeter Wave Detectors Conference, vol. 2275, pp. 21-26, San Diego CA, July 24-29, 1994.

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