People

Reinhold Ludwig

Publications

Peer-Reviewed (Refereed) Journal Articles

G. Bogdanov, R. Ludwig, and W.R. Michalson, "A New Apparatus for Non-Destructive Evaluation of Green-State Powder Metal Compacts Using the Electrical Resistivity Method," Journal of Measurement Science and Technology, Vol. 11, pp. 157-166, January 2000.
S. Makarov, R. Ludwig, and D. Apelian, "The Effect of a Short Pulse of Current on Small Particles in a Conducting Fluid," Journal of Nondestructive Evaluation, Vol. 18, pp. 99-102, December 1999.
S. Makarov, R. Ludwig, and D. Apelian, "Electromagnetic Visualization Technique for Non-Metallic Inclusions in a Melt," Journal of Measurement Science and Technology, Vol. 10, pp. 1049-1053, November 1999.
S. Makarov, R. Ludwig, and D. Apelian, "Resonant Oscillation of a Liquid Metal Column Driven by Electromagnetic Lorentz Force Sources," Journal of Acoustical Society of America, 105 (4), pp. 2216-2225, April 1999.
R. Ludwig, S. Makarov, and D. Apelian, "Three-Dimensional Solution and Experimental Confirmation for the Electric Resistivity Testing of Surface-Breaking Defects in Green-State Powder Metallurgy Compacts," Journal of Nondestructive Evaluation, Vol. 17, No. 3, pp. 153-166, December 1998.
J. Stander, J. McNeill, and R. Ludwig, "Multi-Probe Impedance Measurement System for Nondestructive Evaluation and Testing of Green-State Powder Metallurgy Parts," IEEE Transactions on Instrumentation, Vol. 47, No. 5, pp. 1367-1371, October 1998.
F. Shi and R. Ludwig, "MRI Gradient Coil Design by Combining Optimization Techniques with the Finite Element Method," in IEEE Transactions in Magnetics, Vol. 34, No. 3, pp. 671-683, May 1998.
J. Stander, J. Plunkett, W. Michalson, J. McNeill, and R. Ludwig, "A Novel Multi-Probe Resistivity Approach to Inspect Green-State Metal Powder Compacts," Journal of Nondestructive Evaluation, Vol. 16, No. 4, pp. 205-214, 1997.
M. Woltereck and R. Ludwig "A Quantitative Analysis of the Separation of Aluminum Cans out of a Waste Stream based on Eddy Current Induced Levitation," in IEEE Transaction on Magnetics, Vol. 33, 1, pp. 772-781, 1997.
S. Funan and R. Ludwig "Two- and Three-Dimensional Numerical Analysis of Gradient and Parasitic Gradient Fields of a Three-Channel Surface Gradient Coil for Magnetic Resonance Imaging," IEEE Transactions on Magnetics, Vol. 32, No. 1, pp. 195-207, 1996.
A. Ustundag, R. Ludwig, P. Levin, J.Schmidt, P. Hagedorn "Two-Dimensional Finite Element Analysis of a Synthetically Loaded Stator in a Piezoelectrically Driven Ultrasonic Motor," International Journal for Computation and Mathematics in Electrical and Electronic Engineering (COMPEL), Vol. 15, No. 1, pp. 15-31, 1996.
S. Funan, L. LaTour, R. Ludwig, C. Sotak "A New Design for a Three-Channel Surface Gradient Coil Employing a Three-Dimensional Finite Element Model," in Journal of Magnetic Resonance in Medicine, Vol. 35, pp. 596-605, 1996.
M. Wismer and R. Ludwig "An Explicit Numerical Time-DoMain Formulation to Simulate Pulsed Pressure Waves in Viscous Fluids Exhibiting Arbirary Frequency Power Law Attenuation," in IEEE Trans. on Ultrason.,Ferroelec., Freq. Contr. (UFFC), Vol. 42, No. 6, November 1995.
A. Ustundag, R. Ludwig, and P. Levin "Analytical Expressions for the Time DoMain Displacement Response of a Piezoelectric Plate Resonator," in IEEE Trans. on Ultrason., Ferroelec., Freq. Contr.(UFFC), Vol. 42, No. 4, pp. 789-792, July 1995.
R. Ludwig and P. Levin "Analytical and Numerical Treatment of Pulsed Wave Propagation into a Viscous Fluid," in IEEE Trans. on Ultrason., Ferroelec., Freq. Contr.(UFFC), Vol. 42, No. 4, pp. 789-792, July 1995.
H. Gan, R. Ludwig, and P. Levin "Nonlinear Diffractive Inversion of Multiple Targets in an Inhomogeneous Acoustic Medium," in J. of Acoust. Soc. Amer., Vol. 94, No. 1, pp. 1651-1662, February 1995.
H. Gan, P.L. Levin and R. Ludwig, "Finite Element Formulation of Acoustic Scattering Phenomena with Absorbing Boundary Condition in the Frequency DoMain," Journal of the Acoustic Society of America, Vol. 94, no. 1, pp. 1651-1662, September 1993.
R. Ludwig, Z. You, and R. Palanisamy, "Numerical Simulations of an Electro-magnetic Acoustic Transducer-Receiver System for NDT Applications," IEEE Transactions on Magnetics, Vol. 29, no. 3, pp. 2081-2089, May 1993.
R. Ludwig, "Theoretical Basis for a Unified Conservation Law Description of the Electromagnetic Acoustic Transduction Process," IEEE Trans. on Ultrasonics, Ferroelectrics, and Frequency Control, 39 (4), pp. 476-480, July 1992.
R. Ludwig, "Numerical Implementation and Model Predictions of a Unified Conservation Law Description of the Electromagnetic Transduction Process," IEEE Trans. on Ultrasonics, Ferromagnetics, and Frequency Control, 39 (4), pp. 481-488, July 1992.
M.G. Wismer and R. Ludwig, "A Hybrid Finite Element/Method of Moment Formulation for Single Frequency Eddy-Current Inversion," IEEE Trans. on Magnetics, 28 (3), pp. 1843-1849, May 1992.
Z. You, M. Lusk, R. Ludwig and W. Lord, "Numerical Simulation of Ultrasonic Wave Propagation in Anisotropic and Attenuative Solid Materials," IEEE Trans. on Ultrasonics, Ferroelectrics, and Frequency Control, 38 (5), pp. 436-445, Sept. 1991.
V. K. Nair, R. Ludwig and R. Anastasi, "Chirp-Z Transform Thickness Investigation of Adhesively Bonded Structures," in IEEE Trans. on Instrumentation and Measurement, Vol. 40, No. 4, pp. 751-758, Aug. 1991.
X.-W. Dai and R. Ludwig, "Analytical Validation of the Numerical Modeling of Pulsed Eddy-Current Phenomena for Nondestructive Evaluation Applications," Electrosoft, 2 (2/3), pp. 186-204, June 1991.
X.-W. Dai, R. Ludwig and R. Palanisamy, "Numerical Simulation of Pulsed Eddy-Current Nondestructive Testing Phenomena," in IEEE Trans. on Magnetics, Vol. 26, No. 6, pp. 3089-3096, Nov. 1990.
R. Ludwig, X-W Dai, "Numerical and Analytical Modeling of Pulsed Eddy-Currents in a Conducting Half-Space", in IEEE Transactions on Magnetics, Vol. 26, No. 1, pp. 299-308, Jan. 1990.
R. Ludwig, D. Moore and W. Lord, "A Comparative Study of Analytical and Numerical Transient Force Excitations on an Elastic Half-Space", in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, Vol. 36, No. 3, pp. 342-350, May 1989.
R. Ludwig and D. Roberti, "A Nondestructive Ultrasonic Imaging System for Detection of Flaws in Metal Blocks", in IEEE Transactions on Instrumentation and Measurement, Vol. 38, No. 1, pp. 113-118, Feb. 1989.

Books (including edited volumes and textbooks)

R. Ludwig and P. Bretchko, RF Circuit Design: Theory and Applications, Prentice-Hall, Upper Saddle River, NJ (ISBN: 0-13-095323-7), 642 pages, 2000.

Presentations

Conference Presentations

R. Ludwig and D. Apelian, "A Novel Crack Detection Methodology for Green- State Powder Metallurgy Compacts using an Array Sensor Electrostatic Testing Approach," 1999 International Conference on Powder Metallurgy, (MPIF), Vancover, BC, June 1999.
R. Ludwig, G. Bodanov, and D. Apelian, "Non-Destructive Electrostatic Determination of Surface Breaking and Subsurface Flaws in Green State P/M Compacts," in 1998 Internaitonal Conference on Powder Metallurgy and Particulate Materials, (MPIF), Las Vegas, NV, May 1998.

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