Publications

Publications

Many of the following publications are available for FREE DOWNLOAD at Iowa State University’s digital repository.  If you would like a copy of a publication that is not available in the repository or your local library, please email me and I will provide you with a copy.

Doctoral Thesis

N. Harfield, “Analytical Methods in Eddy Current Nondestructive Evaluation” Department of Physics, University of Surrey, UK, (1994).

Books Co-Edited

  1. J. Knopp, M. Blodgett, B. Wincheski and N. Bowler (eds.), Electromagnetic Nondestructive Evaluation (XIII), Studies in Applied Electromagnetics and Mechanics, vol. 33 (IOS Press, Amsterdam, 2010).
  2. L. Udpa and N. Bowler (eds.), Electromagnetic Nondestructive Evaluation (IX), Studies in Applied Electromagnetics and Mechanics, vol. 25 (IOS Press, Amsterdam, 2005).

Book Chapter

N. Bowler, Negative Refractive Index Composite Metamaterials for Microwave Technology, Microwave and Millimeter Wave Technologies from Photonic Bandgap Devices to Antenna and Applications, I. Minin (ed.), Intech, ISBN 978-953-7619-66-4, 468 pages, March 2010.  Available online here.  (3619 downloads at 12/30/13!)

Articles in Journals

  •       *       Denotes publication that has undergone stringent editorial review by peers.
  •       ‡       Denotes publication co-authored with graduate or undergraduate students advised, or postdoctoral researcher supervised.
  1. *,‡ T. Chen, J. R. Bowler and N. Bowler, Analytical Solution for Capacitance Calculation of a Curved Patch Capacitor that Conforms to the Curvature of a Homogeneous Cylindrical Dielectric Rod, Appl. Phys. Lett., accepted December 2013.
  2. *,‡ C. S. Daily, W. Sun, M. R. Kessler, X. Tan and N. Bowler, Modeling the Interphase of a Polymer-Based Nanodielectric, IEEE Trans. Dielectr. Electr. Insul., accepted October 2013.
  3. *,‡ R. T. Sheldon and N. Bowler, An Interdigital Capacitive Sensor for Nondestructive Evaluation of Wire Insulation, IEEE Sensors J., accepted October 2013.
  4. X. Pang,Y. He,B. Jiang, J. Iocozzia, L. Zhao,H. Guo,J. Liu,M. Akinc, N. Bowler,X. Tan, and Z. Lin, Block Copolymer/Ferroelectric Nanoparticle Nanocomposites, Nanoscale, 5, 8695-8702, 2013.
  5. *,‡ Y. Li and N. Bowler, Computation of Mie derivatives, Appl. Optics, 52, 4997-5006, 2013.
  6. *,‡ P. R. Hondred, N. Bowler and M. R. Kessler, Electrothermal Lifetime Prediction of Polyimide Wire Insulation with Application to Aircraft, J. Appl. Polymer Sci., 130, 1639-1644, 2013.
  7. *,‡ J. Liu, X. Zhang, D. E. Bowen, E. A. Eastwood and N. Bowler, Plasticization and Reinforcement in a Boron Cage Compound Polyurethane Nanocomposite: A Dielectric Study, J. Non-crystalline Solids, 371-372, 6-13, 2013.
  8. *,‡ P. R. Hondred, S. Yoon, N. Bowler and M. R. Kessler, Degradation Kinetics of Polytetrafluoroethylene and poly(ethylene-alt-tetrafluoroethylene), High Performance Polymers, 25, 535-542, 2013.
  9. *X. Tan, W.X. Sun, W.Z. Sun, M.R. Kessler, N. Bowler, K.W. Dennis, R.W. McCallum and Q. Li, Multifunctional properties of cyanate ester composites with SiO2 coated Fe3O4 fillers, ACS Appl. Mater. Interfaces, 5, 1636-1642, 2013.
  10. *,‡ Y. Li and N. Bowler, Effects of parameter variations on negative effective constitutive parameters of non-metallic metamaterials, J. Appl. Phys., 113, 063501, 2013.
  11. *,‡ J. Liu, H. Guo, X. Pang, X. Tan, M. Akinc, Z. Lin and N. Bowler, Dynamics of Polystyrene-b-Poly(methylmethacrylate) (PS-b-PMMA) Diblock Copolymers and PS/PMMA Blends: a Dielectric Study, J. Noncrystalline Solids, 359, 27-32, 2013.
  12. *H. Z. Guo, Ya. Mudryk, M. I. Ahmad, X. C. Pang, L. Zhao, M. Akinc, V. K. Pecharsky, N. Bowler, Z. Q. Lin and X. Tan, Structure evolution and dielectric behavior of polystyrene-capped barium titanate nanoparticles, J. Mater. Chem., 22, 23944, 2012.
  13. *,‡ T. Chen and N. Bowler, A Capacitive Probe for Quantitative Nondestructive Evaluation of Wiring Insulation, NDT&E International, 52, 9-15, 2012.
  14. *,‡ Y. Li and N. Bowler, Traveling Waves on Three-Dimensional Arrays of Two Different Magnetodielectric Spheres Arbitrarily Arranged on a Simple Tetragonal Lattice, IEEE Trans. Ant. Propag., 60, 2727-2739, 2012.
  15. *,‡ T. Chen and N. Bowler, Analysis of a Capacitive Sensor for the Evaluation of Circular Cylinders with a Conductive Core, Meas. Sci. Technol., 23, 045102 (10pp), 2012.
  16. *,‡ T. Chen and N. Bowler, A Rotationally-Invariant Capacitive Probe for Materials Evaluation, Mater. Eval., 70, 161-172, 2012.
  17. *,‡ T. Chen, N. Bowler and J. R. Bowler, Analysis of Arc-electrode Capacitive Sensors for Characterization of Dielectric Cylindrical Rods, IEEE Trans. Instrumentation Meas., 61, 233-240, 2012.
  18. *,‡ Y. Li and N. Bowler, Analysis of Double-Negative (DNG) Bandwidths for Metamaterials Composed of Three-Dimensional Periodic Arrays of Two Different Magnetodielectric Spheres Arbitrarily Arranged on a Simple Tetragonal Lattice, IEEE Antennas and Wireless Propagation Letters, 10, 1484-1487, 2011.
  19. *,‡ L. Li, N. Bowler, P. R. Hondred and M. R. Kessler, Statistical Analysis of Electrical Breakdown Behavior of Polyimide Following Degrading Processes, IEEE Trans. Dielectr. Electr. Insul., 18, 1955-1962, 2011.
  20. *,‡ P. R. Hondred, S. Yoon, N. Bowler, E. Moukhina and M. R. Kessler, Degradation Kinetics of Polyimide Film, High Performance Polymers, 23, 335-342, 2011.
  21. *,‡ J. Liu and N. Bowler, Analysis of Double-Negative (DNG) Bandwidth for a Metamaterial Composed of Magnetodielectric Spheres Embedded in a Matrix, IEEE Antennas and Wireless Propagation Letters, 10, 399-402, 2011.
  22. *,‡ J. Liu and N. Bowler, Analysis of Losses in a Double-Negative (DNG) Metamaterial Composed of Magnetodielectric Spheres Embedded in a Matrix, Microwave and Optical Technology Letters, 53, 1649-1652, 2011.
  23. *,‡ L. Li, N. Bowler, P. R. Hondred, and M.R. Kessler, Influence of Thermal Degradation and Saline Exposure on Dielectric Permittivity of Polyimide, J. Phys. Chem. Solids. 72, 875-881, 2011.
  24. *E. A. Stefanescu, X. Tan, Z. Lin, N. Bowler and M. R. Kessler, Multifunctional Fiberglass-Reinforced PMMA-BaTiO3 Structural/Dielectric Composites, Polymer, 52, 2016-2024, 2011.
  25. *,† N. Bowler, Topical Review: Four-Point Potential Drop Measurements for Materials Characterization, Meas. Sci. Technol., 22, 012001 (11pp), 2011.
  26. *,‡ Y. Li, N. Bowler and D. B. Johnson, A Resonant Microwave Patch Sensor for Detection of Layer Thickness or Permittivity Variations in Multilayered Dielectric Structures, IEEE Sensors J., 11, 5-15, 2011. DOI:  HYPERLINK “http://dx.doi.org/10.1109/JSEN.2010.2051223” \t “_blank” 10.1109/JSEN.2010.2051223
  27. *,‡ T. Chen and N. Bowler, Analysis of a Concentric Coplanar Capacitive Sensor for Nondestructive Evaluation of Multi-layered Dielectric Structures, IEEE Trans. Dielectr. Electr. Insul., 17, 1307-1318, 2010.
  28. * E. A. Stefanescu, X. Tan, Z. Lin, N. Bowler and M. R. Kessler, Multifunctional PMMA-Ceramic Composites as Structural Dielectrics, Polymer, 51, 5823-5832, 2010.
  29. *,‡ L. Li, N. Bowler, M. R. Kessler and S.-H. Yoon, Dielectric Response of PTFE and ETFE Wiring Insulation to Thermal Exposure, IEEE Trans. Dielectr. Electr. Insul., 17, 1234-1241, 2010.
  30. *,‡ Y. Li and N. Bowler, Resonant Frequency of a Rectangular Patch Sensor Covered With Multilayered Dielectric Structures, IEEE Trans. Ant. Propag., 58, 1883-1889, 2010.
  31. *,†,‡ C. Zhang, N. Bowler and C. C. H. Lo, Magnetic Characterization of Surface-Hardened Steel, J. Magnetism and Magnetic Materials, 321, 3878-3887, 2009.
  32. * F. Chao, N. Bowler, X. Tan, G. Liang and M. R. Kessler, Influence of Adsorbed Moisture on the Properties of BaTiO3/cyanate ester composites, Composites: Part A, 40, 1266-1271, 2009.
  33. *,‡ Y. Lu, N. Bowler, J. R. Bowler and Y. Huang, Edge Effects in Four-Point Direct Current Potential Drop Measurements on Metal Plates, J. Phys. D: Appl. Phys., 42, 135004, 2009.
  34. *,‡ J. Liu and N. Bowler, Comment on: Finite-Element Modeling Method for the Study of Dielectric Relaxation at High Frequencies of Heterostructures made of Multilayered Particle [J. Appl. Phys. 102, 124107 (2007)],  J. Appl. Phys., 104, 096105, 2008.
  35. *,†,‡ T. C. Maloney, N. Bowler and N. L. Fischer, Microwave Absorption Characteristics of Composites with Tungsten Coated Filler Particles, IEEE Trans. Dielectr. Electr. Insul., 15, 686-693, 2008.
  36. N. Bowler, Course in Eddy Current Nondestructive Testing to Pilot New Online Graduate Certificate in NDT, Mater. Eval., 66, 910-912, 2008.
  37. *,† J. R. Bowler, Y. Huang, H. Sun, J. Brown, and N. Bowler, Alternating current potential drop measurement of the depth of case-hardening in steel rods, Meas. Sci. Technol., 19, 075204, 2008.
  38. *,† J. R. Bowler and N. Bowler, Theory of Four-Point Alternating Current Potential Drop Measurements on Conductive Plates, Proc. R. Soc. A, 463, 817-836, 2007.
  39. *,† N. Bowler, Designing Dielectric Loss at Microwave Frequencies using Multi-Layered Filler Particles in a Composite, IEEE Trans. Dielectr. Electr. Insul., 13, 703-711, 2006.
  40. * E. Tuncer, N. Bowler, I. J. Youngs and K. P. Lymer, Investigating Low Frequency Dielectric Properties of a Composite with the Distribution of Relaxation Times Technique, Phil. Mag. 86, 2359–2369, 2006.
  41. * I. J. Youngs, N. Bowler and O. Ugurlu, Dielectric Relaxation in Composites Containing Electrically Isolated Particles with Thin Semi-Continuous Metal Coatings, J. Phys. D: Appl. Phys., 39, 1312-1325, 2006.
  42. * E. Tuncer, N. Bowler and I. J. Youngs, Application of the Spectral Density Function Method to a Composite System, Physica B, 373, 306-312, 2006.
  43. *,† N. Bowler, Theory of Four-Point Alternating Current Potential Drop Measurements on a Metal Half-Space, J. Phys. D: Appl. Phys., 39, 584-589, 2006.
  44. *,† N. Bowler, Theory of Four-Point Direct-Current Potential Drop Measurements on a Metal Plate, Res. Nondestr. Eval., 17, 29-48, 2006.
  45. *,†,‡ N. Bowler and Y. Huang, Electrical Conductivity Measurement of Metal Plates using Broadband Eddy-Current and Four-Point Methods, Meas. Sci. Technol., 16, 2193-2200, 2005.
  46. * I. J. Youngs, N. Bowler, K. P. Lymer and S. Hussain, Dielectric Relaxation in Metal-Coated Particles: the Dramatic Role of Nano-Scale Coatings, J. Phys. D: Appl. Phys., 38, 188-201, 2005.
  47. *,†,‡ N. Bowler and Y. Huang, Model-Based Characterization of Homogeneous Metal Plates using Four-Point Alternating Current Potential Drop Measurements, IEEE Trans. Mag., 41(6), 2102–2110, 2005.
  48. *,† N. Bowler, Effects of Lossy, Layered Filler Particles on the Bulk Permittivity of a Composite Material, J. Phys. D: Appl. Phys., 37, 326-333, 2004.
  49. *,† N. Bowler, Electric Field due to Alternating Current Injected at the Surface of a Metal Plate, J. Appl. Phys., 96(8), 4607-4613, 2004.
  50. *,† N. Bowler, Analytical solution for the electric field in a half-space conductor due to alternating current injected at the surface, J. Appl. Phys., 95(1), 344-348, 2004.
  51. *,† J. R. Bowler and N. Bowler, Evaluation of the Magnetic Field Near a Crack with Application to Magnetic Particle Inspection,  J. Phys. D: Appl. Phys., 35(18), 2237-2242, 2002.
  52. *,† N. Harfield, Bulk Permittivity of a Composite with Coated Spheroidal Filler Particles, J. Mater. Sci., 35(23), 5809–5816, 2000.
  53. *,† J. R. Bowler, N. Harfield, N. P. Merricks and W. J. Woodman, A Theoretical Analysis of Eddy-Current Effects in Loudspeaker Motors,  J. Audio Eng. Soc., 48(7-8), 668–678,  2000.
  54. * J. R. Bowler and N. Harfield, Thin-Skin Eddy-Current Interaction with Semi-Elliptical and Epicyclic Cracks. IEEE Trans. Mag., 36(1), 281–291, 2000.
  55. *,† N. Harfield, Conductivity Calculation for a Two-Phase Composite with Spheroidal Inclusions.  J. Phys. D: Appl. Phys., 32(10), 1104–1113, 1999.
  56. *,† N. Harfield, Conductivity of a Periodic Particle Composite with Spheroidal Inclusions. European Physical J. Appl. Phys., 6(1), 13–21, 1999.
  57. * J. R. Bowler and N. Harfield, Evaluation of Probe Impedance due to Thin-Skin Eddy-Current Interaction with Surface Cracks. IEEE Trans. Mag., 34(2), 515–523, 1998.
  58. * J. R. Bowler, Y. Yoshida and N. Harfield, Vector-Potential Boundary-Integral Evaluation of Eddy-Current Interaction with a Crack. IEEE Trans. Mag., 33(5), 4287–4294, 1997.
  59. *,† N. Harfield and J. R. Bowler, Theory of Thin-Skin Eddy-Current Interaction with Surface Cracks. J. Appl. Phys., 82(9), 4590–4603, 1997.
  60. *,#,† N. Harfield and J. R. Bowler, A Geometrical Theory for Eddy-Current Non-Destructive Evaluation. Proc. R. Soc. A, 453(1961), 1121–1152, 1997.
  61. *,#,† N. Harfield, Y. Yoshida and J. R. Bowler, Low-Frequency Perturbation Theory in Eddy-Current Non-Destructive Evaluation. J. Appl. Phys., 80(7), 4090–4100, 1996.
  62. *,#,† N. Harfield and J. R. Bowler, Solution of the Two-Dimensional Problem of a Crack in a Uniform Field in Eddy-Current Non-Destructive Evaluation. J. Phys. D: Appl. Phys., 28(10), 2197–2205, 1995.
  63. *,#,† N. Harfield and J. R. Bowler, Analysis of Eddy-Current Interaction with a Surface-Breaking Crack. J. Appl. Phys., 76(8), 4853–4856, 1994.

Peer-Reviewed Conference Proceedings

  1. *,‡ R. Ding and N. Bowler, Influence of Accelerated Aging on Dielectric Properties of Extruded Nylon 6 Film, 2013 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena, IEEE Dielectrics and Electrical Insulation Society, Shenzhen, China, October 20-23, 2013.  CD-ROM.  Pages: 4.
  2. *,‡ W. Sun, X. Tan, M. R. Kessler and N. Bowler, Silicon/Epoxy Nanocomposites Capacitors as the Energy Storage Element, 2013 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena, IEEE Dielectrics and Electrical Insulation Society, Shenzhen, China, October 20-23, 2013.  CD-ROM.  Pages: 4.
  3. *,‡ D. M. Rock, X. Tan, N. Bowler and M. R. Kessler, Dielectric and Mechanical Properties of Polyimide-Barium Titanate Nanocomposites, 2012 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena, IEEE Dielectrics and Electrical Insulation Society.  CD-ROM.  Pages: 4.
  4. *,‡ X. Zhang, N. Bowler, S. Faik and R. L. Siebels, The Role of Nano-Clay in Improving Circuit-Breaker Dielectric Performance, 2012 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena, IEEE Dielectrics and Electrical Insulation Society.  CD-ROM.  Pages: 4.
  5. *,‡ W. Sun, X. Tan, M. R. Kessler and N. Bowler, Dielectric Properties of Cyanate Ester/Silicon Nanocomposites for Multifunctional Structural Capacitors, 2012 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena, IEEE Dielectrics and Electrical Insulation Society.  CD-ROM.  Pages: 4.
  6. *,‡ C. S. Daily, M. R. Kessler, X. Tan and N. Bowler, On the Nanoparticle Interphase, 2012 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena, IEEE Dielectrics and Electrical Insulation Society.  CD-ROM.  Pages: 4.
  7. *,‡ Y. Li and N. Bowler, Statistical analysis of affect of parameter variations on double-negative behavior of metamaterials, IEEE International Symposium on Antennas and Propagation, Chicago IL, July 2012, online at ieeexplore.ieee.org.  Pages: 2.
  8. *,‡ N. Bowler, M. R. Kessler, L. Li, P. R. Hondred and T. Chen, Electromagnetic Nondestructive Evaluation of Wire Insulation and Models of Insulation Material Properties, Report Number: NASA/CR-2012-217330, NF1676L-14135, at: HYPERLINK “http://www.sti.nasa.gov/”http://www.sti.nasa.gov/
  9. *,‡ Y. Li and N. Bowler, Rational Design of Double-Negative Metamaterials Consisting of 3D Arrays of Two Different Non-Metallic Spheres Arranged on a Simple Tetragonal Lattice, IEEE International Symposium on Antennas and Propagation, Spokane WA, July 3-8, 2011. pp. 1494-1497.
  10. *,‡ Li Li, N. Bowler, P. R. Hondred and M.R. Kessler, Dielectric Response of Polyimide to Thermal and Saline Degradation, 2010 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena, IEEE Dielectrics and Electrical Insulation Society.  CD-ROM.  Pages: 4.
  11. *,‡ E. Izci and N. Bowler, Dielectric Properties of Isotactic Polypropylene and Montmorillonite Nanocomposites, 2010 10th IEEE International Conference on Solid Dielectrics (ICSD), DOI: 10.1109/ICSD.2010.5568047.
  12. * P. R. Hondred, S.-H. Yoon, N. Bowler and M. R. Kessler, A Comparison of Degradation Kinetics for Aerospace Wire Insulation Materials, Proceedings of the 38th North American Thermal Analysis Society Annual Conference (NATAS 2010). Aug. 15-18, 2010. University of Pennsylvania, PA. CD-ROM. Pages: 7.
  13. *,‡ T. Chen and N. Bowler, Analysis of Concentric Coplanar Capacitor for Quantitative Dielectrometry. In: Knopp, J., Blodgett, M., Wincheski, B. and Bowler, N., Studies in Applied Electromagnetics and Mechanics 33.  Amsterdam: IOS Press, 2010. pp. 61-68.
  14. *,‡ Y. Li and N. Bowler, Design of Patch Sensors for Microwave Nondestructive Evaluation of Aircraft Radomes. In: Knopp, J., Blodgett, M., Wincheski, B. and Bowler, N., Studies in Applied Electromagnetics and Mechanics 33.  Amsterdam: IOS Press, 2010. pp. 45-52.
  15. * P. R. Hondred, S.-H. Yoon, N. Bowler and M. R. Kessler, Onset Degradation Kinetics of Poly(ethylene‑alt‑tetrafluoroethylene), Proceedings of the 37th North American Thermal Analysis Society Annual Conference (NATAS 2009). Sep. 20-23, 2009. Lubbock, TX. CD-ROM. Pages: 9.
  16. *,‡ L. Li, N. Bowler, S.-H. Yoon and M. R. Kessler, Dielectric Properties of ETFE Wiring Insulation as a Function of Thermal Exposure, 2009 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena, IEEE Dielectrics and Electrical Insulation Society.  CD-ROM.  Pages: 4.
  17. *,‡ L. Li, N. Bowler, S.-H. Yoon and M. R. Kessler, Dielectric Properties of PTFE Wiring Insulation Materials as a Function of Thermal Exposure, 2008 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena, IEEE Dielectrics and Electrical Insulation Society, 95-98.
  18. * S.-H. Yoon, N. Bowler and M. R. Kessler, Thermal Analysis Properties of PTFE Electrical Wiring Insulation Material, Proceedings of the North American Thermal Analysis Society Annual Conference (NATAS 2008). Aug. 18-20, 2008. Atlanta, GA. CD-ROM. Pages: 9.
  19. * F. Chao, N. Bowler, X. Tan, G. Liang and M. R. Kessler, Three-Phase Composites for Multifunctional Structural Capacitors, Proceedings of the SAMPE 2008 Fall Technical Conference, September 8-11, 2008, Memphis, TN. CD-ROM. Pages: 10.
  20. *,† N. Bowler and J. R. Bowler, Theory of Four-Point Alternating Current Potential Drop Measurements on a Layered Conductive Half-Space, In: Tamburrino, A., Melikov Y., Chen, Z. and Udpa, L., Studies in Applied Electromagnetics and Mechanics 31.  Amsterdam: IOS Press, 2008.  pp. 203-210.
  21. *,†,‡ N. Bowler and Y. Huang, Approximate Theory of Four-Point Alternating Current Potential Drop on a Flat Metal Surface, In: Udpa, L. and Bowler, N., Studies in Applied Electromagnetics and Mechanics 25.  Amsterdam: IOS Press, 2005. pp. 23–30.
  22. ‡ E. R. Abram and N. Bowler, Effect of relative humidity on the curing and dielectric properties of polyurethane-based composites, 2005 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena, IEEE Dielectrics and Electrical Insulation Society, 457-460.
  23. * F. Villone and N. Harfield, Simulation of the Effects of Current Leakage across Thin Cracks.  In: Udpa, S. S., Takagi, T., Pavo, J. and Albanese, R., Studies in Applied Electromagnetics and Mechanics 17.  Amsterdam: IOS Press, 2000.  pp. 79–86.
  24. *,† N. Harfield and J. R. Bowler, Prediction of Eddy-Current Signals due to Cracks Concealed by Surface Deposits.  In: Lesselier, D. and Razek, A., Studies in Applied Electromagnetics and Mechanics 15.  Amsterdam: IOS Press, 1999.  pp. 188–199.
  25. * J. R. Bowler and N. Harfield, High Frequency Eddy Current Interaction with Cracks. In: Albanese, R., Rubinacci, G., Takagi, T. and Udpa, S. S., Studies in Applied Electromagnetics and Mechanics 14.  Amsterdam: IOS Press, 1998.  pp. 9–16.
  26. *,† N. Harfield and J. R. Bowler, A Thin-Skin Theory of Current Leakage across Surface Cracks.  In: Albanese, R., Rubinacci, G., Takagi, T. and Udpa, S. S., Studies in Applied Electromagnetics and Mechanics 14.  Amsterdam: IOS Press, 1998. pp. 1–8.
  27. *,† N. Harfield and J. R. Bowler, Theory of Eddy-Current Interaction with Surface Cracks in Ferromagnetic Steels.  In: Takagi, T., Bowler, J. R. and Yoshida, Y., Studies in Applied Electromagnetics and Mechanics 12.  Amsterdam: IOS Press, 1997. pp. 59–66.
  28. *,#,† N. Harfield and J. R. Bowler, A New Method for Predicting Eddy-Current Interaction with Cracks based on the Geometrical Theory of Diffraction.  In: Collins, R., Dover, W. D., Bowler, J. R. and Miya, K., Studies in Applied Electromagnetics and Mechanics 8.  Amsterdam: IOS Press, 1995. pp. 103–114.

Unreviewed Conference Proceedings

  1. ‡ T. Chen and N. Bowler, Design of Interdigital and Concentric Capacitive Sensors for Materials Evaluation, In: Thompson, D. O. and Chimenti, D. E., Review of Progress in Quantitative Nondestructive Evaluation, The 39th Annual Review of Progress in Quantitative Nondestructive Evaluation, AIP Conf. Proc. 1511, 1593-1600, 2013.
  2. ‡ R. T. Sheldon and N. Bowler, An Interdigital Capacitive Sensor for Quantitative Characterization of Wire Insulation, In: Thompson, D. O. and Chimenti, D. E., Review of Progress in Quantitative Nondestructive Evaluation, The 39th Annual Review of Progress in Quantitative Nondestructive Evaluation, AIP Conf. Proc. 1511, 1578-1585, 2013.
  3. ‡ T. Chen, J. M. Song, J. R. Bowler and N. Bowler, Analysis of a Concentric Coplanar Capacitive Sensor Using a Spectral Domain Approach, Review of Progress in Quantitative Nondestructive Evaluation, ed. by D. O. Thompson and D. E. Chimenti, AIP Conference Proceedings 1335, 2011, pp. 1647-1654.
  4. D. Gottschalk, E. A. Stefanescu, X. Tan, N. Bowler, Z. Lin and M. R. Kessler, Polydicyclopentadiene Matrix Composites for Multifunctional Capacitors, SAMPE Fall Technical Conference, Salt Lake City, UT, 11-14 October 2010.
  5. E. A. Stefanescu, J. E. De León, X. Tan, Z. Lin, N. Bowler and M. R. Kessler, PMMA-Matrix Ternary Composites for Multifunctional Capacitors, SAMPE Fall Technical Conference, Salt Lake City, UT, 11-14 October 2010.
  6. P. R. Hondred, S.-H. Yoon, N. Bowler and M. R. Kessler, Degradation Kinetics of Polyimide Insulation Material, Aircraft Airworthiness and Sustainment Conference, Austin, TX, 10-13 May 2010.  HYPERLINK “http://www.airworthiness2010.com” http://www.airworthiness2010.com.  Pages: 5.
  7. ‡ L. Li, N. Bowler, S.-H. Yoon and M. R. Kessler, Dielectric Response of PTFE Wiring Insulation to Thermal Exposure, Aircraft Airworthiness and Sustainment Conference, Austin, TX, 10-13 May 2010.  HYPERLINK “http://www.airworthiness2010.com” http://www.airworthiness2010.com. Pages: 11.
  8. ‡ T. Chen and N. Bowler, Cylindrical Capacitive Sensor for the Evaluation of Wire Insulation and Cable Degradation, Aircraft Airworthiness and Sustainment Conference, Austin, TX, 10-13 May 2010.  HYPERLINK “http://www.airworthiness2010.com” http://www.airworthiness2010.com.  Pages: 7.
  9. N. Bowler, Iowa State University’s Nondestructive Evaluation Distance Learning Program, ASNT 18th Annual Research Symposium and Spring Conference, St. Louis, MO, 16-20 March 2009, pp. 44-46.
  10. ‡ C. Zhang and N. Bowler, Electromagnetic Characterization of the Depth of Surface-Hardening in Steel, Review of Progress in Quantitative Nondestructive Evaluation, ed. by D. O. Thompson and D. E. Chimenti, AIP Conference Proceedings, 2009, 1096, pp. 1333-1340.
  11. ‡ Y. Lu, J. R. Bowler, C. Zhang and N. Bowler, Edge Effects in Four Point Direct Current Potential Drop Measurement, Review of Progress in Quantitative Nondestructive Evaluation, ed. by D. O. Thompson and D. E. Chimenti, AIP Conference Proceedings, 2009, 1096, pp. 271-278.
  12. ‡ J. Liu and N. Bowler, Dielectric resonance in composites filled with metal-coated microspheres, 2008 IEEE MTT-S International Microwave Symposium Digest, pp. 1341-1344.
  13. N. Bowler, Frequency-Dependence of Relative Permeability in Steel, Review of Quantitative Nondestructive Evaluation Vol. 25, ed. by D. O. Thompson and D. E. Chimenti, CP820, AIP, 2006, pp. 1269-1276.
  14. †,‡ N. Bowler and E. R. Abram, Monitoring the Effect of Relative Humidity during Curing on Dielectric Properties of Composites at Microwave Frequencies, Review of Quantitative Nondestructive Evaluation Vol. 25, ed. by D. O. Thompson and D. E. Chimenti, CP820, AIP, 2006, pp. 469-476.
  15. E. Tuncer and N. Bowler, An empirical dielectric mixture expression and its application to composites, 2005 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena, IEEE Dielectrics and Electrical Insulation Society, 152-154.
  16. N. Bowler, I. J. Youngs, K. P. Lymer and S. Hussain, Dielectric relaxation of a composite with tungsten nano-layered spherical filler particles, 2004 Annual Report: Conference on Electrical Insulation and Dielectric Phenomena, IEEE Dielectrics and Electrical Insulation Society, 381-384.
  17. H. Sun, J. R. Bowler, N. Bowler and M. J. Johnson, Eddy Current Measurements on Case Hardened Steel.  28th Annual Review of Progress in Quantitative Nondestructive Evaluation, Brunswick, Maine 2001.
  18. N. Bowler, J. R. Bowler and W. N. Podney, Response Model of Superconductive, Pulsed Eddy-Current Probes for Detection of Deep-Lying Flaws.  In: Thompson, D. O. and Chimenti, D. E., Review of Progress in Quantitative Nondestructive Evaluation, Volume XX.  New York: AIP Conference Proceedings 557 2001.  pp. 941–948.
  19. J. R. Bowler and N. Harfield, The Evaluation of Magnetic Flux at a Crack in a Ferromagnetic Steel Component. In: Thompson, D. O. and Chimenti, D. E., Review of Progress in Quantitative Nondestructive Evaluation, Volume XIX.  New York: AIP Conference Proceedings 509 2000.  pp. 1573–1580.
  20. N. Harfield, J. R. Bowler and G. C. Stevens, Modelling the Electrical Conductivity of Two-Phase Composite Materials.  Institute of Physics Conference Series, vol. 163, 1999.  pp. 41–44.
  21. S. Mastorchio and N. Harfield, Modelling of Eddy-Current Interaction with Cracks in the Thin-Skin Regime: Two Approaches. The 7th European Conference on Non-Destructive Testing, Copenhagen: 26–29 May 1998.
  22. N. Harfield and J. R. Bowler, Prediction of Eddy-Current Probe Impedance due to Surface Cracks in Ferromagnetic Steels.  In: Thompson, D. O. and Chimenti, D. E., Review of Progress in Quantitative Nondestructive Evaluation, Volume XVI.  New York: Plenum, 1997.  pp. 241–248.
  23. #,† N. Harfield and J. R. Bowler, Analytical Calculations of Eddy-Current Probe Impedance Response to Cracks.  In: Thompson, D. O. and Chimenti, D. E., Review of Progress in Quantitative Nondestructive Evaluation, Volume XIII.  New York: Plenum, 1994.  pp. 279–286.

Abstracts and Technical Presentations

Presenter is underlined.

  1. R. LeSar, D. M. Dimiduk and N. Bowler, Integration of Materials Science and Nondestructive Evaluation for Materials Characterization, TMS 2014 143rd Annual Meeting and Exhibition, San Diego, Feb. 16-20, 2014.
  2. N. Bowler, Iowa State University’s Undergraduate Minor, Online Graduate Certificate and Resource Center in NDE, Asia Pacific Conference on Nondestructive Testing, Mumbai, India, November 2013.
  3. D. E. Bowen, E. A. Eastwood, S. Sarkar, J. Liu, X. Zhang and N. Bowler, Polymer Property Manipulation and Characterization, Joint Working Group (JOWOG) Main Meeting 28, Atomic Weapons Establishment, Aldermaston, Kent, United Kingdom, Sept. 9, 2013.
  4. N. Bowler, M. B. Meyer, K. Derocher, C. S. Daily, R. Sheldon and V. Dayal, Electromagnetic Nondestructive Evaluation for Degradation Assessment in Bismaleimide-Glass Fiber Composites, NDT of Composites, Seattle, WA, May 13-14, 2013.
  5. C. S. Daily and N. Bowler, Modeling the Nanoparticle Interphase, Dielectrics 2013, Reading, United Kingdom, April 10-12, 2013.
  6. X. Zhang, J. Liu, D. E. Bowen, E. A. Eastwood and N. Bowler, Dielectric Spectroscopy for Investigation of Plasticization and Reinforcement in Boron Cage Compounds, Iowa Academy of Science 124th Annual Meeting, Mason City, IA, April 20-21, 2012.
  7. J. Liu, H. Guo, X. Pang, X. Tan, M. Akinc, Z. Lin and N. Bowler, Dynamics of Polystyrene-b-Poly(Methyl Methacrylate) (PS-b-PMMA) Diblock Copolymer and PS/PMMA Blend: A Dielectric Study, Iowa Academy of Science 124th Annual Meeting, Mason City, IA, April 20-21, 2012.
  8. N. Bowlerand Y. Li, Traveling Waves on Three-Dimensional Simple-Tetragonal Periodic Arrays of Two Different Magnetodielectric Spheres, USNC-USRI National Radio Science Meeting, Boulder, CO, January 4-6, 2012.
  9. N. Bowler and T. Chen, Capacitive Sensors for Measuring Complex Permittivity of Planar and Cylindrical Test Pieces, 12th International Symposium on Nondestructive Characterization of Materials, Blacksburg, VA, June 19-24, 2011.
  10. N. Bowler and T. Chen, A Capacitive Sensor for Inspecting Wiring Insulation, The 2011 Aircraft Airworthiness and Sustainment Conference, San Diego, CA, April 18-21, 2011.
  11. N. Bowler, E. A. Stefanescu, L. Li, W. Sun, X. Tan, Z. Lin and M. R. Kessler, Dielectric Properties of PMMA-MMT Nanocomposites, Dielectrics 2011, Canterbury, United Kingdom, April 13-14, 2011.
  12. Y. Li and N. Bowler, Rational Design of Double-Negative Metamaterials Consisting of Cubic Arrays of Two Different Non-Metallic Spheres, Electronic Materials and Applications, Orlando, FL, January 19-21, 2011.
  13. P. R. Hondred, S.-H. Yoon, N. Bowler and M. R. Kessler, Degradation Kinetics of Aerospace Wire Insulation Material, Society of Engineering Science 47th Annual Technical Meeting, Iowa State University, October 4-6, 2010.
  14. D. Gottschalk, E. Stefanescu, X. Tan, N. Bowler, Z. Lin and M. R. Kessler, Ring-Opening Metathesis Polymerization-based Composites for Multifunctional Capacitors, Iowa Academy of Science 122nd Annual Meeting, Decater, IA, April 16-17, 2010.
  15. J. E. De León, E. Stefanescu, X. Tan, Z. Lin, N. Bowler and M. R. Kessler, Improvement of Dielectric Properties of Bisphenol E Cyanate Ester Matrix Composites with Nano- and Micro-Scale Filler for Multifunctional Applications, Iowa Academy of Science 122nd Annual Meeting, Decater, IA, April 16-17, 2010.
  16. Y. Li and N. Bowler, Resonant Patch Sensors for Microwave Nondestructive Evaluation of Stratified Dielectric Structures, ASNT 19th Annual Research Symposium and Spring Conference, Williamsburg, VA, 22-26 March, 2010.
  17. P. R. Hondred, L. Li, T. Chen, S.-H. Yoon, N. Bowler and M. R. Kessler, Modeling and Nondestructive Evaluation of Wire Insulation, Interagency Wiring Group Meeting, Kennedy Space Center, December 8-10, 2009.
  18. N. Bowler, L. Li, P. R. Hondred, T. Chen and M. R. Kessler, Investigation of Dielectric and Thermal Properties of Wire Insulating Polymers for Development of Capacitive Nondestructive Evaluation, NASA Aviation Safety Technical Conference, McLean, VA, November 17-19, 2009.
  19. ‡ J. Liu and N. Bowler, Non-Periodic Isotropic Dielectric Double-Negative (DNG) Metamaterials, ETOPIM 8, Rethymnon, Crete, 7-12 June, 2009.
  20. K. N. Lindley, J. Liu and N. Bowler, Design of Coated Spheres for Negative Refractive Index in a Meta-Film at Microwave Frequencies, Iowa Academy of Science 121st Annual Meeting, Des Moines, IA, April 17-18, 2009.
  21. N. Bowler, Materials Characterization by Four-Point DC and AC Potential Drop Measurements, ASNT Fall Conference, Charleston, SC, November 10-14, 2008.
  22. N. Bowler, L. Li, S.-H. Yoon and M. R. Kessler, Dielectric and Thermal Analysis Properties of PTFE Wiring Insulation for Nondestructive Evaluation and Lifetime Prediction, NASA Aviation Safety Technical Conference, Denver, CO, October 21-23, 2008.
  23. N. Bowler and J. Liu, Negative Permittivity and Permeability of a Composite Filled with Layered Microspheres, Progress In Electromagnetics Research Symposium, Cambridge, MA, July 2-6, 2008.
  24. D. B. Johnson and N. Bowler, Microwave NDE of low-loss composite materials using coplanar microstrip resonators, ASNT 17th Annual Research Symposium and Spring Conference, Anaheim, CA, March 31-April 4, 2008.
  25. N. L. Fischer and N. Bowler, Novel Composite Materials for Frequency-Specific Microwave Absorption, 2008 MRS Spring Meeting, San Francisco, CA, March 24-28, 2008.
  26. N. L. Fischer and N. Bowler, Novel Composites for Microwave Absorption, Iowa Academy of Sciences Annual Review Meeting, Pella, IA, April 27-28, 2007.
  27. J. R. Bowler and N. Bowler, Theory of Four-Point Alternating Current Potential Drop Measurements on a Conductive Cylindrical Rod, 13th International Symposium on Applied Electromagnetics and Mechanics, Michigan State University, September 9-12, 2007.
  28. J. R. Bowler, N. Bowler and W. N. Podney, Evaluation of Crack Signals for a Superconductive Pulsed Eddy-Current Probe.  7th International Workshop on Electromagnetic Nondestructive Evaluation, Kobe, Japan 2001.