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EM Sensors has access to a new 3D printing technology that offers one the ability to deposit many diferent material types (conductors, dielectrics, ceramics etc.) onto a wide variety of substrates with very small (10 micron) feature sizes.  The technology is useful for printing electronic components, sensors and antennas onto 3D or conformal surfaces in prototype and production settings alike.  Please contact us today to find out more.

Resume

Johnson's academic resume in Adobe PDF format is included here along with his latest Teaching and Research Statements.

Papers (WITH links)

M. J. Johnson, C. C. H. Lo, S. Hentscher and E. Kinser, Analysis of Conductivity and Permeability Profiles in Hardened Steel, 9th Annual Symposium of Electromagnetic Nondestructive Evaluation, East Lansing, Michigan, pp135-142, 2004.

Papers (without links)

B. Zhu, M. J. Johnson, C. C. H. Lo and D. C. Jiles, Multifunction Magnetic Barkhausen Emission Measurement System, IEEE Transactions on Magnetics, Vol. 37, No. 3, May 2001, pp1095.

B. Zhu, M. J. Johnson, C. C. H. Lo and D. C. Jiles, Evaluation of Wear-Induced Material Loss in Case-Hardened Steel using Magnetic Barkhausen Emission Measurements, IEEE Transactions on Magnetics, Vol. 37, No. 3, May 2001, pp1095.

M. J. Johnson, R. Chen, D. C. Jiles and V. R. Ramanan, Reducing Core Losses in Amorphous Fe₈₀B₁₂Si₈ Ribbons by Laser-Induced Domain Refinement, IEEE Transactions on Magnetics, Vol. 35, No. 5, pp3865.

J. R. Bowler and M. J. Johnson, Pulsed Eddy-Current Response to a Conducting Half-Space, IEEE Transactions on Magnetics, Vol. 33, No. 3, 1997.

V. J. Garcia, D. M. Clatterbuck, C. C. H. Lo, M. J. Johnson and D. C. Jiles, Dynamical Assessment of Magnetic Barkhusen Signals, Review of Progress in Quantitative Nondestructive Evaluation, Vol. 19A,  pp781.

D. M. Clatterbuck, V. J. Garcia, M. J. Johnson and D. C. Jiles, Modeling of the Magnetic Barkhausen Effect, Review of Progress in Quantitative Nondestructive Evaluation, Vol. 19B,  pp1533.

M. J. Johnson, B. Zhu, C. C. H. Lo, D. C. Jiles and R. E. Shannon, The Effects of Aging Time and Temperature on the Magnetic Properties of Nickel Alloys, Review of Progress in Quantitative Nondestructive Evaluation, Vol. 20B, pp1429.

M. J. Johnson, C. C. H. Lo, B. Zhu, H. Cao and D. C. Jiles, Magnetic Measurements for NDE: Background, Implementation and Applications, invited review article for the Indian Society for Non-Destructive Testing’s Journal of Non-Destructive Evaluation, Vol. 20, No. 4, pp11, 2000.

D. J. Brown, C. M. Hils and M. J. Johnson, Massively Multiplexed Eddy Current Testing and its Comparison with Pulsed Eddy Current, Review of Progress in Quantitative Nondestructive Evaluation, AIP Conf. Proc. 700, 390 (2004).

D. Utrata and M. J. Johnson, Development of Magnetic Particle Method for Forensic Recovery of Serial Numbers, Review of Progress in Quantitative Nondestructive Evaluation, AIP Conf. Proc. 700, 1438 (2004).

M. J. Johnson, C. C. H. Lo, and L. Naidu, Hall-Effect Measurements under AC Excitation for the Reconstruction of Obliterated Serial Numbers in Magnetic Steels, Review of Progress in Quantitative Nondestructive Evaluation, AIP Conf. Proc. 700, 1445 (2004). 

M. J. Johnson, J. R. Bowler and F. Azeem, Pulsed Eddy-Current NDE at Iowa State University — Recent Progress and Results, Review of Progress in Quantitative Nondestructive Evaluation, Vol. 22, pp390.

M. J. Johnson, D. C. Jiles, C. C. H. Lo, P. Zombo, and B. Zhu,  Magnetic NDE measurements on 410 stainless steel: An on-site and laboratory evaluation, Review of Progress in Quantitative Nondestructive Evaluation, Vol. 21, pp1591. 

M. J. Johnson, L. C. Kerdus, C. C. H. Lo, J. E. Snyder, J. Leib, S. J. Lee, M. Mina, and D. C. Jiles, Studies on the effects of pulsed-magnetic field treatment on magnetic materials, Review of Progress in Quantitative Nondestructive Evaluation, Vol. 21, pp1569.

H. Sun, J. R. Bowler, N. Bowler, and M. J. Johnson, Eddy Current Measurements on Case Hardened Steel, Review of Progress in Quantitative Nondestructive Evaluation, Vol. 21, pp1561.

M. J. Johnson, J. Zhou, B. Zhu, N. Nakagawa, and D. C. Jiles, Evaluation of Wear-Induced Material Loss in Case-Hardened Steel, AIP Conf. Proc. 509, 1465 (2000). 

D. L. Nelson, M. J. Johnson, and N. Nakagawa, A Database Design for the Storage and Statistical Analysis of Impedance Data for the Characterization of Noise In Eddy-Current Scans, AIP Conf. Proc. 700, 613 (2004).  

H. Sun, R. Ali, M. J. Johnson and J. R. Bowler, Enhanced Flaw Detection Using an Eddy Current Probe with a Linear Array of Hall Sensors, AIP Conf. Proc. 760, 516 (2005).  

M. J. Johnson, N. Nakagawa, S. E. Wendt, S. R. Hentscher, D. L. Nelson, K. T. Buhr, B. A. Kilbugh, and D. C. Raithel, Studies into the Effects of Surface Roughness on Spatial Eddy-Current Data from Nickel-Based Engine Alloys, AIP Conf. Proc. 760, 425 (2005).   

M. J. Johnson and J. R. Bowler, Inversion of Transient Eddy-Current Signals for the Determination of Conducting Plate Parameters, Review of Progress in Quantitative Nondestructive Evaluation, Vol. 14A, pp849-856, 1994. 

M. J. Johnson and J. R. Bowler, Model-Based Inversion of Transient Eddy-Current Signals, Studies in Applied Electromagnetics and Mechanics, Vol. 10, International Symposium on Nonlinear Electromagnetic Systems (ISEM), pp495-498, 1995. 

J. R. Bowler and M. J. Johnson, Advances in Transient Eddy-Current Nondestructive Evaluation, Studies in Applied Electromagnetics and Mechanics, Vol. 10, International Symposium on Nonlinear Electromagnetic Systems (ISEM), pp623-627, 1995.