Publications
Book Chapters:
1. A.C. Cangellaris and R. Lee, “Solution of the two-dimensional Helmholtz equation using the bymoment method,” Integral Methods in Science and Engineering-90, pp. 249-259, 1991.
2. R. Lee and A.C. Cangellaris, “Scattering from an arbitrary cylinder in the presence of a parallel planar media interface using the bymoment method,” Progress in Electromagnetic Research, Vol. 4, Elsevier Science Pub., pp. 345-372, 1991.
Papers in Refereed Journals:
1989
1. R. Lee, D.G. Dudley, and K.F. Casey, “Electromagnetic coupling by a wire through a circular aperture in an infinite planar screen,” J. of Electromagnetic Waves and Applications, Vol.3, No.4, pp. 281-305, 1989.
1990
2. R. Lee and D.G. Dudley, “Transient current propagation along a wire penetrating a circular aperture in an infinite planar conducting screen,“ IEEE Trans. on Electromag. Compatibility, Vol. 32, No. 2, pp. 137-143, May 1990.
3. D.B. Wright, R. Lee, and D.G. Dudley, “Transient current on a wire penetrating a cavity-backed circular aperture in an infinite screen,” IEEE Trans. on Electromag. Compatability, Vol. 32, No. 3, pp. 197-204, August 1990.
4. A.C. Cangellaris and R. Lee, “The bymoment method for two-dimensional electromagnetic scattering,” IEEE Trans.Antennas and Propagat., AP-38, pp. 1429-1437, September 1990.
5. R. Lee and A.C. Cangellaris, “Application of the bymoment method to electromagnetic scattering from multiple cylinders,” Radio Science, Vol. 25,No. 5, pp. 731-741, September 1990.
1991
6. A.C. Cangellaris and R. Lee, “Finite element analysis of electromagnetic scattering from inhomogeneous cylinders at oblique incidence,” IEEE Trans. Antennas and Propagat., AP-39, pp. 645-650, May 1991.
1992
7. D.B. Wright, R. Lee, D.G. Dudley, and K.F. Casey, “Scattering from a cavity-backed circular aperture penetrated by a wire,” IEEE Trans. Electromag. Compatability., Vol. 34, No. 2, pp. 133-136 May 1992.
8. R. Lee and A.C. Cangellaris, “A study of discretization error in the finite element approximation of wave solutions,” IEEE Trans. Antennas and Propagat., AP-40,pp.~542-549, May 1992.
9. A.C. Cangellaris and R. Lee, “On the accuracy of numerical wave simulations based on finite methods,'' J. of Electromagnetic Waves and Applications, vol. 6,no. 12, pp.1635-1653, 1992.
1993
10. R. Lee and T.T. Chia, “Analysis of electromagnetic scattering from a cavity with a complex termination by means of a hybrid ray-FDTD method,” IEEE Trans. Antennas Propagat., AP-41, pp. 1560-1569, Nov. 1993.
1994
11. R. Lee and V. Chupongstimun, “A partitioning technique for the finite element solution of electromagnetic scattering from electrically large dielectric cylinders,” IEEE Trans. Antennas Propagat., AP-42, pp. 737-741, May 1994.
12. J.O.
Jevtic and R. Lee, “On the choice of metrons in the MEI method,'' COMPEL -- Int.
Journal Comp. and Math. in Electrical and Electronic
13. J.O. Jevtic and R. Lee, ``A theoretical and numerical analysis of the measured equation of invariance,” IEEE Trans. Antennas Propagat., AP-42, pp. 1097-1105, August 1994.
14. W.P. Pinello, R. Lee, and A.C. Cangellaris, “Finite element modeling of electromagnetic wave interactions with periodic structures,” IEEE Trans. Microwave Theory and Techniques, MTT-42, pp. 2294-2301, December 1994.
1995
15. U. Pekel and R. Lee, “An a posteriori error reduction scheme for the three dimensional finite element solution of Maxwell's equations,'” IEEE Trans. Microwave Theory and Techniques, MTT-43, pp. 421-427, February 1995.
16. J.O. Jevtic and R. Lee, “How invariant is the measured equation of invariance?,'' IEEE Microwave and Guided Wave Letters, Vol. 5, pp. 45-47, February 1995.
17. L. Hamandi, R. Lee, and F. Ozguner, “Review of domain decomposition methods for the implementation of FEM on massively parallel computers,” IEEE Antennas and Propagation Magazine, February, 1995.
18. A. Bataineh, R. Lee, and F. Ozguner, “Electrical characterization of high-speed interconnects with a parallel three-dimensional finite difference time-domain algorithm,” SIMULATION, Vol. 64, pp. 289-295, May 1995.
19. T.L. Barkdoll and R. Lee, “Finite element analysis of bodies of revolution using the measured equation of invariance,” Radio Science, Vol. 30, No. 4, pp. 803-815 July/August 1995.
20. U. Pekel and R.~Lee, “A 3-D application of the bymoment method for electromagnetic scattering,” Journal of Electromagnetic Waves and Application, Vol. 9, pp. 973-992, July/August 1995.
21. T.T. Chia, R.J. Burkholder and R. Lee, “The application of FDTD in hybrid methods for cavity scattering analysis,” IEEE Trans. Antennas and Propagat., AP-43, pp.1082-1090, October 1995.
22. J.O. Jevtic and R. Lee, “An analytic characterization of the error in the measured equation of invariance,” IEEE Trans. Antennas and Propagat., AP-43, pp. 1109-1115, October 1995.
23. Z.S. Sacks, D.M. Kingsland, R. Lee, and J.F. Lee, “A perfectly matched anisotropic absorber for use as an absorbing boundary condition,” IEEE Trans. Antennas and Propagat., AP-43, pp. 1460-1463, December 1995.
1996
24. J.W. Nehrbass, J.F. Lee, and R. Lee, “Stability analysis for perfectly matched layer absorber,” Electromagnetics, Vol. 16, pp. 385-397, July/August 1996.
25. R. Lee, Z. Chen, J.O. Jevtic, and J.F. Lee, ``Important considerations in the evaluation of absorbing boundary conditions,'' Electromagnetics, Vol. 16, pp.417-433, July/August 1996.
26. J.O. Jevtic and R. Lee, “Solenoidal edge elements,” Radio Science, pp. 977-990, July/August 1996.
27. Y.S. Choi-Grogan, K. Eswar, P. Sadayappan, and R. Lee, “Sequential and parallel implementations of a partitioning finite element method,” IEEE Trans. Antennas and Propagat., AP-44, pp. 1609-1616, Dec. 1996.
1997
28. J.Y. Wu, D.M. Kingsland, J.F. Lee, and R. Lee, “A comparison of anisotropic PML to Berenger's PML and its application to the finite element method for EM scattering,” IEEE Trans. Antennas and Propagat., AP-45, pp. 40-50, Jan. 1997.
29. J.F. Lee, R. Lee, and A.C. Cangellaris, “Time domain finite element methods,” IEEE Trans. Antennas and Propagat., AP-45, pp. 430-442, March 1997.
30. J.Y. Wu and R. Lee, “The advantages of triangular and tetrahedral edge elements for electromagnetic modeling with the finite element method,” IEEE Trans.Antennas and Propagat., AP-45, pp. 1431-1437. Sept. 1997.
1998
31. J.W. Nehrbass, J.O. Jevtic, and R. Lee, “Reducing the phase error in finite difference methods without increasing the order,” IEEE Trans. Antennas and Propagat., AP-46, pp. 1194-1201, August 1998.
1999
32. K. Rama Rao, J.W. Nehrbass, and R. Lee, ``Discretization errors in finite methods: issues and possible solutions,” Computer Methods in Applied Mechanics and Engineering, Vol. 169, pp. 219-236, 1999.
33. K. Rama Rao and R. Lee, ``An optimal edge based finite difference solution to the vector Helmholtz equation in two dimensions,” IEEE Trans. Magnetics, Vol. 35, pp. 1462-1465, May 1999.
34. E.M. Nassar, R. Lee, and J.D. Young, “A probe for determining the material properties of sea ice,” IEEE Trans. Antennas and Propagat., AP-47, pp.1085-1093, June 1999.
35. Y. Zhu and R. Lee, “TVFEM analysis of periodic structures for radiation and scattering,” Journal of Electromagnetics Waves and Applications, Vol. 13, pp. 1679-1680, 1999.
36. A. Kangarlu, B.A. Baertlein, R. Lee, T. Ibrahim, L. Yang, A.M. Abduljalil, and P.M.L. Robitaille, “Dielectric resonance phenomena in ultra high field MRI,'' Journal of Computer Assisted Tomography, Vol. 23, pp. 821-831, November/December 1999.
2000
37. J.Y. Wu, J.W. Nehrbass, and R. Lee, “A comparison of PML for TVFEM and FDTD,” Int. Journal of Numerical Modeling Electronics, Vol. 13, pp. 233-244, March-June 2000.
38. R.D. Slone and R. Lee, “Applying Pade via Lanczos to the finite element method for electromagnetic radiation problems,” Radio Science, Vol. 35, pp. 331-340, March-April 2000.
39. B.A. Baertlein, O. Ozbay, T.S. Ibrahim, R. Lee, Y. Yu, A. Kangarlu, and P.M.L. Robitaille, “Theoretical model for a MRI radio frequency resonator,” IEEE Trans. Biomedical Engineering, Vol. 47, pp. 535-546, April 2000.
40. E.M. Nassar, J.T. Johnson, and R. Lee, “A numerical model for electromagnetic scattering from sea ice,” IEEE Trans. Geoscience and Remote Sensing, Vol. 38, pp. 1309-1319, May 2000.
41. J.W. Nehrbass and R. Lee, ``Optimal finite difference sub-gridding techniques applied to the Helmholtz equation,” IEEE Trans. Microwave Theory Tech., MTT-48, pp. 976-984, June 2000
42. T.S. Ibrahim, R. Lee, B.A. Baertlein, A. Kangarlu, P.M.L. Robitaille, “Application of finite difference time domain method for the design of birdcage RF head coils using multiport excitations,” Magnetic Resonance Imaging, Vol. 18, pp. 733-742, July 2000.
43. T.S. Ibrahim, R. Lee, B.A. Baertlein, Y. Yu, and P.M.L. Robitaille, “Computational analysis of the high pass birdcage resonator: Finite difference time domain simulations for high-field MRI,” Magnetic Resonance Imaging, Vol. 18, pp. 835-843, Sept. 2000.
2001
44. T. S. Ibrahim, R. Lee, B. A. Baertlein, and P.-M. L. Robitaille, ``B_1 Field Homogeneity and SAR Calculations in the High Pass Birdcage Coil,'' Physics in Medicine and Biology, Vol. 46, pp. 609-619, February 2001.
45. T. S. Ibrahim, R. Lee, A. M. Abduljalil, B. A. Baertlein, A. Kangarlu, R. Gilbert, and P.-M. L. Robitaille, ``Dielectric resonances in UHFMRI: Computational Analysis and Experimental Findings,'' Magnetic Resonance Imaging, Vol. 19, pp. 219-226, Feb. 2001.
46. T. S. Ibrahim, R. Lee, A. M. Abduljalil, B. A. Baertlein, and P.-M. L. Robitaille, ``Calculations of EM interactions with biological tissue: Magnetic resonance imaging at ultra high field,'' Applied Computational Electromagnetics Journal, Vol. 16, pp. 138-144, 2001.
47. C. C. Chen, K. Rama Rao, and R. Lee, ``A Tapered-permittivity rod antenna for ground penetrating radar applications,'' J. Applied Geophysics, Vol. 47, pp. 309-316, July 2001.
48. R.
D, Slone, R. Lee, and J. F. Lee, ``
49. T. S. Ibrahim, A. M. Abduljalil, B. A. Baertlein, R. Lee, and P. M. L. Robitaille, “Analysis of B-1 field profiles and SAR values for multi-strut transverse electromagnetic RF coils in high field MRI applications,” Physics in Medicine and Biology, Vol. 46, pp. 2545-2555 Oct. 2001.
50. T. S. Ibrahim, R. Lee, and PML. Robitaille, “Effect of RF coil excitation on field inhomogeneity at ultra high fields: a field optimized TEM resonator”, Magnetic Resonance Imaging, Vol. 19, pp. 1339-1347, December 2001.
2002
51. R.D. Slone, J.F. Lee, and R. Lee, ``Automating multipoint Galerkin asymptotic waveform evaluation for a finite element fast frequency sweep,'' IEEE Trans. Magnetics, Vol. 38, pp. 637-640, March 2002.
52. R.D. Slone, J.F. Lee and R. Lee, ``A comparison of some model order reduction techniques,'' Electromagnetics, Vol. 22, pp. 275-289, May-June 2002.
53. S.M Wang, F.L. Teixeira, R. Lee, and J.F. Lee, ``Optimization of subgridding schemes for FDTD,'' IEEE Microwave and Wireless Component Letters, Vol. 12, pp. 223-225, June 2002.
54. Y. Srisukh, J. Nehrbass, F.L. Teixeira, J.F. Lee. and R. Lee, “An approach for automatic grid generation in three-dimensional FDTD simulations of complex geometries,” IEEE Ant Propagat. Mag., Vol. 44, pp.75-80, 2002.
2003
55. C. Chen, K. Rama Rao, and R. Lee, “A new ultrawide-bandwidth dielectric-rod antenna for ground-penetrating radar applications,” IEEE Tran. Antenna Propagat., AP-51, pp. 371-377, March 2003.
56. S.C. Lee, J.F. Lee, and R. Lee, “Hierarchical vector finite elements for analyzing waveguiding structures” IEEE Tran. Microwave Theory, MTT-51, pp. 1897-1905, August 2003.
57. J.
F. Lee, R. Lee, and R. J. Burkholder, “
58. R. D. Slone, R. Lee, and J.F. Lee, “Well-conditioned asymptotic waveform evaluation for finite elements,” IEEE Tran Antenna Propagat., AP-51, pp. 2442-2447, Sep. 2003.
59. R. D. Slone, R. Lee, and J.F. Lee, “Broadband
model order reduction of polynomial matrix equations using single-point
well-conditioned asymptotic waveform evaluation: derivations and theory”, Int.
J. Numer. Meth.
2004
60. N. V. Venkatarayalu, C. C. Chen, F. L. Teixeira, and R. Lee, “Numerical modeling of ultrawide-band dielectric horn antennas using FDTD,” IEEE Tran. Antennas Propagat., Vol. 52, pp. 1318-1323, May 2004.
61. J. F. Lee, R. Lee, and F. Teixeira, “Hierarchical vector finite elements with p-type non-overlapping Schwarz Method for modeling waveguide discontinuities,” CMES-COMP MODEL ENG 5 (5): 423-434 May 2004
62. K. H. Lee, C. C. Chen, F. L. Teixeira, and R. Lee, “Modeling and investigation of a geometrically complex UWB GPR antenna using FDTD,” IEEE Tran. Antennas Propagat., Vol. 52, pp. 1983-1991, Aug. 2004.
2005
63. S. M. Wang, R. Lee, and F. L. Teixeira, “Implicit nonstaggered finite-difference time-domain method,” Microwave and Optical Tech. Letters, Vol 45, pp. 317-319, May 2005
64. K. H. Lee, C. C. Chen, and R. Lee, ”Novel dual-polarized tapered-chamber feed design concepts,” IEEE Antennas and Propagation Magazine, Vol. 47, pp. 214-218, August 2005.
65. T. S. Ibrahim, C. Mitchell, P. Schmalbrock, R. Lee, and D. W. Chakeres, “Electromagnetic perspective on the operation of RF coils at 1.5-11.7 Tesla,” Magnetic Resonance in Medicine, Vol. 54, pp. 683-690, Sept. 2005.
2006
66. R. A. Chilton and R. Lee, “Chirping unit cell length to increase frozen mode bandwidth in non-reciprocal magnetic photonic crystals,” IEEE Trans. Microwave Theory Tech., Vol 54, pp. 473-480, Jan. 2006.
67. S. Wang, R. Lee, and F. L. Teixeira, “Anisotropic-medium PML for vector FETD with modified basis functions,” IEEE Trans. Antennas and Propagat., Vol. 54, pp. 20-27, Jan. 2006.
68. R. Lee, “A note on mass lumping in the finite element time domain method,” IEEE Trans. Antennas and Propagat, Vol. 54, pp. 760-762, Feb. 2006.
69. T.S.
Ibrahim and R. Lee, “Evaluation of MRI RF probes utilizing infrared sensors,”
IEEE Trans. Biomedical
Proceedings in Conference:
1989
1. A.C.
Cangellaris and R. Lee, “A finite-element method for solving electromagnetic
scattering problems,” IEEE Antennas Propagat. Symp. Digest,
1992
2. W.
Pinello and R. Lee, “A finite element solution for electromagnetic scattering
from an infinite periodic grating,” IEEE Antennas Propagat. Symp. Digest,
1993
3. R.
Lee and T.T. Chia, “A hybrid ray/FDTD method for computing electromagnetic
scattering from an engine cavity with a complex termination,” 9th Annual Review
of Progress in Applied Computational Electromagnetics,
1994
4. Y.S. Choi-Grogan, R. Lee, K. Eswar, and P. Sadayappan, “The performance of a partitioning finite element method on the Touchstone Delta,” 10th Annual Review of Progress in Applied Computational Electromagnetics, Monterey, CA, March 1994.
5. A.
Bataineh, R. Lee, and F. Ozguner, “Electrical characterization of high-speed
interconnects with a parallel three-dimensional finite difference time-domain
algorithm,” High Performance Computing '94,
6. R.
Lee and J.O. Jevtic, “Several approaches to improving the solution in the
measured equation of invariance,” IEEE Antennas Propagat. Symp. Digest,
7. L.
Hamandi, R. Lee, and F. Ozguner, “A domain decomposition technique for the
parallel solution of linear systems of equations resulting from finite element
discretization,” International Conference on Electronic Circuits and Systems,
1995
8. L.
Hamandi, F. Ozguner, and R. Lee, “The performance of the parallel solution of
the Quasi-Minimal Residual (QMR) method for 2D mesh architectures,” 11th Annual
Review of Progress in Applied Computational Electromagnetics,
1996
9. R.
Lee, ``An overview of numerical dispersion error in PDE methods for
electromagnetics,” 12th Annual Review of Progress in Applied Computational
Electromagnetics,
10. Z.
Chen and R. Lee, “Adaptive mesh refinement concepts for electromagnetics,” 12th
Annual Review of Progress in Applied Computational Electromagnetics,
11. J.
Nehrbass and R. Lee, “Stability analysis for perfectly matched absorbers,''
Joint AP-S Symposium and URSI Radio Science Meeting,
1998
12. T.S. Ibrahim, Y. Yu, R. Lee, B.A. Baertlein, A. Kangarlu, and P.~Robitaille, “Finite difference time domain simulations for high-field MRI,” Proc. ISMRM 6th Annual Meeting of International Society of Magnetic Resonance in Medicine, Sydney, Australia, April 1998.
13. T.S. Ibrahim, R. Lee, B.A. Baertlein, A. Kangarlu, and P.M.L. Robitaille, “Magnetic field homogeneity and SAR issues for high-field MRI,” Proc. ISMRM 6th Annual Meeting of International Society of Magnetic Resonance in Medicine, Sydney, Australia, April 1998.
14. B.A. Baertlein, O. Ozbay, T.S. Ibrahim, Y. Yu, X. Zang, R. Lee, A. Kangarlu, and P.M.L. Robitaille, “Theoretical model of the MRI TEM resonator,'' Proc. ISMRM 6th Annual Meeting of International Society of Magnetic Resonance in Medicine, Sydney, Australia, April 1998.
1999
15. T.S. Ibrahim, R. Lee, B.A. Baertlein, A. Kangarlu, and P.M.L. Robitaille, “SAR and B_1 field homogeneity study at high-field MRI: 3T-9T,” Proc. ISMRM 7th Annual Meeting of International Society of Magnetic Resonance in Medicine, Philadelphia, PA, May 1999.
16. T.S.
Ibrahim, R. Lee, B.A. Baertlein, A. Kangarlu, and P.M.L. Robitaille,
“Comparison between linear, quadrature, and 4-port excitations from 1.5 T to
4.7 T,” Proc. ISMRM 7th Annual Meeting
of International Society of Magnetic Resonance in Medicine,
17. T.S. Ibrahim, R. Lee, B.A. Baertlein, A. Kangarlu, and P.M.L. Robitaille, “On the physical feasibility of achieving linear polarization at high field: A study of the birdcage coil,” Proc. ISMRM 7th Annual Meeting of International Society of Magnetic Resonance in Medicine, Philadelphia, PA, May 1999.
18. T.S. Ibrahim, R. Lee, B.A. Baertlein, A. Kangarlu, and P.M.L. Robitaille, “3-Dimensional full wave analysis for MRI RF coils,” Proc. ISMRM 7th Annual Meeting of International Society of Magnetic Resonance in Medicine, Philadelphia, PA, May 1999.
19. R. Burgess, L. Yang, X. Zhang, T.S. Ibrahim, B.A. Baertlein, R. Lee, A.M. Abduljalil, A. Kangarlu, P.M.L. Robitaille, “Human Imaging at 8 Tesla,” Proc. ISMRM 7th Annual Meeting of International Society of Magnetic Resonance in Medicine, Philadelphia, PA, May 1999.
20. A. Kangarlu, L. Yang, B.A. Baertlein, A.M. Abduljalil, X. Zhang, T.S. Ibrahim, Y. Yu, R. Lee, and P.M.L. Robitaille, “Analysis of dielectric resonances at 8.0 Tesla,” Proc. ISMRM 7th Annual Meeting of International Society of Magnetic Resonance in Medicine, Philadelphia, PA, May 1999.
21. A.M. Abduljalil, A. Kangarlu, X. Zhang, Y. Yu, L. Yang, T.S. Ibrahim, R. Lee, B.A. Baertlein, R. Burgess, S. Bair, and P.M.L. Robitaille, “A quantum leap in human magnetic resonance: Imaging at 8.0 Tesla,” Proc. ISMRM 7th Annual Meeting of International Society of Magnetic Resonance in Medicine, Philadelphia, PA, May 1999.
22. R.D.
Slone and R. Lee, “Matrix Pade via Lanczos for FEM problems”, IEEE Antennas
Propagat. Symp. Digest,
2000
23. T.S. Ibrahim, R. Lee, B.A. Baertlein, A. Kangarlu, and P.-M.L. Robitaille, “Dielectric resonance in ultra high field MRI,” Proc. ISMRM 8th Annual Meeting of International Society of Magnetic Resonance in Medicine, Denver, Colorado, USA, April 2000.
24. T.S. Ibrahim, R. Lee, B.A. Baertlein, and P.-M.L.Robitaille, “FDTD numerical comparison of multi-strut TEM resonators,” Proc. ISMRM 8th Annual Meeting of International Society of Magnetic Resonance in Medicine, Denver, Colorado, USA, April 2000.
25. T.S. Ibrahim, R. Lee, B.A. Baertlein, and P.-M.L. Robitaille, “Accurate SAR and B_1 field calculations using high resolution head models,” Proc. ISMRM 8th Annual Meeting of International Society of Magnetic Resonance in Medicine, Denver, Colorado, USA, April 2000.
26. C.C.
Chen, K. Rama Rao and R. Lee, “A modified ultra-wide bandwidth dielectric rod
antenna", Eighth International Conference on Ground Penetrating Radar,
27. K.
Rama Rao, C.C. Chen, R. Lee and K. O'Neill, “A comparison of scattering
characteristics of UXO and non-UXO objects in the presence of a water
table", The UXO/Countermine Forum,
28. K.H. Lee, K. Rama Rao, R. Lee and C.C. Chen, “Electromagnetic scattering characteristics of UXO and non-UXO objects in the presence of water table,” IEEE International Geoscience and Remote Sensing Symposium, Honolulu, Hawaii, July 2000.
29. R.D.
Slone, J.F. Lee and R. Lee, “
30. T.S.
Ibrahim, R. Lee, B.A. Baertlein, and P.-M.L. Robitaille, “Optimized
radiofrequency resonators for high field NMR clinical imaging,” IEEE Antennas
Propagat. Symp. Digest,
31. T.S. Ibrahim, R. Lee, B.A. Baertlein, and P.-M.L. Robitaille, “Experimental validation of simulated inside a loaded birdcage coil,” Proc. European Society of Magnetic Resonance in Medicine and Biology, Paris, France, September 2000.
32. T.S.
Ibrahim, R. Lee, B.A. Baertlein, and P.-M.L. Robitaille, “Strut-to-strut
coupling vs. head-to-strut coupling: Evaluation of the TEM resonator},” Proc.
European Society of Magnetic Resonance in Medicine and Biology,
33. T.S. Ibrahim, R. Lee, B.A. Baertlein, and P.-M.L. Robitaille, “Optimum field distribution using phased array concepts,” Proc. European Society of Magnetic Resonance in Medicine and Biology, Paris, France, September 2000.
34. T.S.
Ibrahim, R. Lee, B.A. Baertlein, and P.-M.L. Robitaille, “RF power deposition
in human head at UHFMRI:Safety study,” Proc. European Society of Magnetic
Resonance in Medicine and Biology,
35. T.S.
Ibrahim, R. Lee, B.A. Baertlein, and P.-M.L. Robitaille, “The effect of
tissue-coil electromagnetic interactions on field inhomogeneity: A study at
high field MRI,” Proc. European Society of Magnetic Resonance in Medicine and
Biology,
2001
36. T.S. Ibrahim, R. Lee, B.A. Baertlein, and P.M.L. Robitaille, “Optimized RF coils for clinical MRI applications at ultra high field,” The 3rd International Society of Magnetic Resonance in Medicine Workshop on Hardware, Cleveland, Ohio, p 39, February 2001.
37. P.M.L. Robitaille, A.M. Abduljalil, T.S. Ibrahim, R. Lee, B.A. Baertlein, and C. Ashman, “A TEM based coil for imaging extremities'', in The 3rd International Society of Magnetic Resonance in Medicine Workshop on Hardware, Cleveland, Ohio, p 43, February 2001.
38. T.S. Ibrahim, R. Lee, B.A. Baertlein, A.M. Abduljalil, and P.M.L. Robitaille, “Dielectric resonances vs. head-coil interactions: a study of the B1 field inhomogeneity at high fields,” in The 3rd International Society of Magnetic Resonance in Medicine Workshop on Hardware, Cleveland, Ohio, p 29, February 2001.
39. T.S. Ibrahim, R. Lee, B.A. Baertlein, and P.M.L. Robitaille, “On the frequency dependence of electromagnetic power deposition in the human head: MRI from 3T to 11T,” in The 42nd Experimental Nuclear Magnetic Resonance Conference, Orlando, Florida, p 220, March 2001.
40. P.M.L. Robitaille, A.M. Abduljalil, T.S. Ibrahim, B.A. Baertlein, R. Lee, and C. Ashman, “An RF extremity coil for MRI applications at high frequencies,” in The 42nd Experimental Nuclear Magnetic Resonance Conference, Orlando, Florida, p189, March 2001.
41. T.S. Ibrahim, B.A. Baertlein, R. Gilbert, A.M. Abduljalil, R. Lee, and P.M.L. Robitaille, “Minimally invasive probing of B1 field distributions in MR coils using infrared sensors,” in The International Society of Magnetic Resonance in Medicine and European Society of Magnetic Resonance in Medicine and Biology Joint Annual Meeting, Glasgow, Scotland, p 695, April 2001.
42. T.S. Ibrahim, R. Lee, B.A. Baertlein, and P.M.L. Robitaille, “Classical analysis of RF power requirements in MRI,” in The International Society of Magnetic Resonance in Medicine and European Society of Magnetic Resonance in Medicine and Biology Joint Annual Meeting, Glasgow, Scotland, p 1578, April 2001.
43. T.S. Ibrahim, R. Lee, B.A. Baertlein, and P.M.L. Robitaille, “Obtaining a homogeneous B1 field at UHF frequencies: use of multiple drives and variable amplitude/ phases,” in The International Society of Magnetic Resonance in Medicine and European Society of Magnetic Resonance in Medicine and Biology Joint Annual Meeting, Glasgow, Scotland, p 692, April 2001.
44. P.M.L. Robitaille, A.M. Abduljalil, T.S. Ibrahim, B.A. Baertlein, R. Lee, and C. Ashman, “A shielded single element TEM Resonator: a simple extremity RF coil for UHFMRI,” in The International Society of Magnetic Resonance in Medicine and European Society of Magnetic Resonance in Medicine and Biology Joint Annual Meeting, Glasgow, Scotland, p 1095, April 2001.
45. R.D. Slone, J.F. Lee and R. Lee, “Some basic issues regarding automating multipoint Galerkin asymptotic waveform evaluation for finite elements” Plenary session at the 13th Conference on the Computation of Electromagnetic Fields, vol. 2, pp. 2-3, Evian, France, July 2001.
46. R.D.
Slone, J.F. Lee and R. Lee, “Systematic method for finding a hierarchical
vector finite element of any order using the Nedelec criteria and a Webb basis”
IEEE Int. Symp. Antennas Propagat.
Proc., vol. 3, pp. 184-187,
47. R.D.
Slone, J.F. Lee and R. Lee, “Terminating the iterative process for the Galerkin
asymptotic waveform evaluation model order reduction technique,” IEEE Int. Symp. Antennas Propagat. Proc.,
vol. 3, pp. 200-203,
48. T.S. Ibrahim, R. Lee, B.A. Baertlein, and P.M.L. Robitaille, “Design of radiofrequency coils for magnetic resonance imaging applications at high fields: technological and physical feasibility issues,” in IEEE Antenna and Propagation Society Annual Meeting, Boston, Massachusetts, pp. 370-373, July 2001.
49. T.S. Ibrahim, R. Gilbert, A.M. Abduljalil, R. Lee, B.A. Baertlein, and P.M.L. Robitaille, “Measuring RF field distributions in MR coils with IR sensors,” in IEEE Antenna and Propagation Society Annual Meeting, Boston, Massachusetts, pp. 374-377, July 2001.
50. R. Lee, and T.S. Ibrahim, B.A. Baertlein, and P.M.L. Robitaille, “RF coil modeling and analysis for high field MRI: lessons learned,” in IEEE Antenna and Propagation Society Annual Meeting, Boston, Massachusetts, pp. 362-365, July 2001.
51. J.F. Lee, R.J. Burkholder, P.H. Pathak, and R. Lee, “Numerical integrations in higher order loop star method of moments for computational electromagnetics,” in IEEE Antenna and Propagation Society Annual Meeting, Boston, Massachusetts, pp. 542-545, July 2001.
52. R.
Lee, J.F. Lee, and P. H. Pathak, “Hybridization of finite methods with other
techniques to solve complex problems,'' in IEEE Antenna and Propagation Society
Annual Meeting,
2002
53. K.-H. Lee, N.V. Venkatarayalu, C.-C. Chen, F.L. Teixeira, and R. Lee, “Numerical modeling development for characterizing complex GPR problems,” Ninth International Conference on Ground Penetrating Radar, SPIE vol. 4758, pp. 652-656, Santa Barbara, CA, April 29- May 2, 2002.
54. T.S. Ibrahim, R. Lee, P. Schmalbrock, and D.W. Chakeres, “Analysis of the electromagnetic polarization of fields induced by RF coils at various field strength,” The 10th International Society of Magnetic Resonance in Medicine Annual Meeting, Honolulu, Hawaii, p 911, May 2002.
55. R.D. Slone, R. Lee, and J.F. Lee, “Ultra broadband fast frequency sweep for polynomial finite element matrix equations using single point model order reduction without linearization,” IEEE Antennas and Propagation Society International Symposium, vol. 2, 716-719, San Antonio, TX, June 2002.
56. S. Wang, F.L. Teixeira, R. Lee, and J.-F. Lee, “Filtering schemes for dispersion optimized FDTD algorithm,” Proceedings of the 2002 IEEE Antennas and Propagation International Symposium, vol. 3, pp. 240-243, San Antonio, TX, June 2002.
57. S. Wang, F.L. Teixeira, R. Lee, and J.-F. Lee, “Angle-optimized FDTD algorithms in two-dimensions,” Proceedings of the 2002 IEEE Antennas and Propagation International Symposium, vol. 3, pp. 248-251, San Antonio, TX, June 2002.
58. S.
Wang, F.L. Teixeira, R. Lee, and J.-F. Lee, “Dispersion-relation-preserving
(DRP) 2D finite-difference time-domain schemes,” Proceedings of the 2002 IEEE
Antennas and Propagation International Symposium, vol. 3, pp. 264-267,
59. K.-H.
Lee, N.V. Venkatarayalu, C.-C. Chen, F.L. Teixeira, and R. Lee, “Numerical
modeling and characterization of fully polarimetric dielectric loaded horn-fed
bow-tie (HFB) for GPR applications using FDTD,” Proceedings of the 2002 IEEE
Antennas and Propagation International Symposium, vol. 3, pp. 472-475,
60. N.V. Venkatarayalu, C.-C. Chen, F.L. Teixeira, and R. Lee, “Impedance characterization of dielectric horn antennas using FDTD,” Proceedings of the 2002 IEEE Antennas and Propagation International Symposium, vol. 4, pp. 482-485, San Antonio, TX, June 2002.
2003
61. S. Wang,
F.L. Teixeira, R. Lee, and J.F. Lee,”Three-Dimensional Angle-Optimized FDTD
Algorithms for Large-Scale Problems,” IEEE AP-S International Symposium,
62. K.H.
Lee, C-C. Chen, F. Teixeira and R. Lee, “Numerical Study of a UWB Dual-Polarized
Feed Design for Enhanced Tapered Chambers,” IEEE AP-S International Symposium,
63. K.H.
Lee, C-C. Chen, F. Teixeira and R. Lee, “Numerical Study of Broadband
Dielectric Rod Probe (DRP) for Near-Field Measurements”, IEEE AP-S
International Symposium,
2004
64. S.
Wang, R. Lee, and F.L. Teixeira, “Anisotropic medium PML for FETD with
conjugate scaled basis functions,” Proceedings of the 2004 IEEE Antennas and
Propagation International Symposium, vol. 3, p. 3485-3488,
2005
65. R.
Chilton and R. Lee, “FEM analysis of frozen mode regime inside chirped MPC's,”
Proc. of the 2005 IEEE AP-S International Symp.,
66. Y.
Srisukh and R. Lee, “The effect of preconditioning for the iterative solution
of the finite element time domain method,” Proc. of the 2005 IEEE AP-S
International Symp,
67. K.
H. Lee, C. C. Chen, and R. Lee, “Development of UWB dual-linear polarization
quad ridged tapered chamber feed antenna,” Proc. of the 2005 IEEE AP-S
International Symp.,
68. Y.
Srisukh, R. Lee, and N.V. Venkatarayalu, “Hybrid finite element/finite
difference methods in the time domain," ICEAA,
Conference Abstracts:
1988
1. R.Lee
and D.G. Dudley, “Current coupling by a wire through a circular aperture in the
presence of an incident quasi-TEM wave,” URSI Radio Science Meeting,
1990
2. R. Lee and A.C. Cangellaris, “Electromagnetic scattering from multiple cylinders using the bymoment method,” URSI Radio Science Meeting, Boulder, CO, January 1990.
3. D.B. Wright, R. Lee, D.G. Dudley and K.F. Casey, “Scattering from a cavity-backed circular aperture penetrated by a wire: The Exterior Region,” URSI Radio Science Meeting, Boulder, CO, January 1990.
4. A.C.
Cangellaris and R. Lee, “Plane wave scattering from material cylinders at
oblique incidence using the bymoment method,” URSI Radio Science Meeting,
5. R.
Lee and A.C. Cangellaris, “Scattering from an arbitrary cylinder in the
presence of a planar media interface using the bymoment method: Part one,
theory,” URSI Radio Science Meeting,
6. R.
Lee and A.C. Cangellaris, “Scattering from an arbitrary cylinder in the
presence of a planar media interface using the bymoment method: Part two,
numerical results,'' URSI Radio Science Meeting,
7. A.C.
Cangellaris and R. Lee, “Solution of the two-dimensional Helmholtz equation
using the bymoment method,” IMSE Conference,
1991
8. R.
Lee and A.C. Cangellaris, “Finite element analysis for an obliquely incident
plane wave incident on cylinders near a planar media interface,” URSI Radio
Science Meeting,
9. R.
Lee, “A study of discretization errors in the finite element method,” URSI
Radio Science Meeting,
1992
10. Y.S.
Choi, R. Lee, and R.C. Chou, “A one-dimensional study of the effect of boundary
conditions on discretization error for FEM,” URSI Radio Science Meeting,
11. U.
Pekel and R. Lee, “An element-by-element a posteriori error estimation and
improvement approach for the finite element analysis of three-dimensional
electromagnetic boundary value problems,” URSI Radio Science Meeting,
12. R.C.
Chou, T.T. Chia and R. Lee, “The energy flow inside a waveguide cavity using
the SBR and GRE methods,” URSI Radio Science Meeting,
1993
13. J.O.
Jevtic and R. Lee, “Higher order divergenceless edge elements,” URSI Radio
Science Meeting,
14. J.O. Jevtic and R. Lee, “An analysis of the measured equation of invariance,'' URSI Radio Science Meeting, Ann Arbor, MI, June 1993.
15. Y.S.
Choi-Grogan and R. Lee, “A sequential and parallel implementation of a
partitioning finite element technique for electromagnetic scattering,” URSI
Radio Science Meeting,
16. T.L.
Barkdoll and R. Lee, “Finite element analysis of bodies of revolution using the
measured equation of invariance,” URSI Radio Science Meeting,
1994
17. J.O.
Jevtic and R. Lee, “On the choice of metrons in the MEI method,” 2nd Workshop
on Finite Element Methods in Electromagnetic Wave Problems,
18. T.T.
Chia, R.J. Burkholder, and R. Lee, “Implementing the hybrid ray-FDTDmethod for
computing the RCS of 3-D open-ended waveguide cavities,” URSI Radio Science
Meeting,
19. U.
Pekel and R.~Lee, “A three-dimensional bymoment method approach for the
analysis of electromagnetic scattering,” URSI Radio Science Meeting,
20. R.
Lee, “An overview of computational electromagnetics,” SICAN Technology
Conference,
1995
21. J.O. Jevtic and R. Lee, “An investigation of the convergence properties of the measured equation of invariance,'' URSI Radio Science Meeting, Boulder, CO, January 1995.
22. D.
Kingsland, R. Dyczij-Edlinger, J.F. Lee, and R. Lee, “Performance
characterization of a perfectly matched anisotropic absorber for frequency
domain FEM applications,” URSI Radio Science Meeting,
23. R.
Lee, J.O. Jevtic, and Z. Chen, “The effect of numerical dispersion on boundary
conditions for wave problems,” Progress in Electromagnetic Research Symposium,
24. J.F. Lee, J.Y. Wu, and R. Lee, “Application of an anisotropic PML and its relationship to Beringer's PML,” Progress in Electromagnetic Research Symposium, Seattle, WA, July 1995.
25. J.O. Jevtic and R. Lee, “Further insights into high order solenoidal edge elements,'' Progress in Electromagnetic Research Symposium, Seattle, WA, July 1995.
1996
26. T.T. Chia, R.J. Burkholder, and R. Lee, “A hybrid high-frequency/FDTD method for computing the RCS of large open-ended waveguide cavities,” URSI Radio Science Meeting, Boulder, CO, Jan. 1996.
27. E.M. Nassar, R. Lee, K. Jezek, and J.D. Young, “In-situ measurement of the complex dielectric constant of sea ice from 1 to 10 GHz,” IGARSS meeting, Lincoln, Nebraska, May 1996.
28. E.M.
Nassar, R. Lee, and J.D. Young, “Electromagnetic probe for in-situ measurement
of the complex dielectric constant of materials,” URSI Radio Science Meeting,
29. J.Y. Wu, R. Lee, and J.F. Lee, “The use of higher order edge-based finite elements to improve the accuracy of the anisotropic perfectly matched layer,'' URSI Radio Science Meeting, Baltimore, MD, July 1996.
30. J.O.
Jevtic and R. Lee, “An improved finite difference Helmholtz equation,'' URSI
Radio Science Meeting,
31. R.
Lee, “Understanding and improving PDE methods for electromagnetics,'' URSI
General Assembly,
1997
32. E.M. Nassar, J.T., Johnson, and R. Lee,”Electromagnetic scattering from sea ice,'' Progress in Electromagnetic Research Symposium, Boston, MA, July 1997.
33. J.Y.
Wu and R. Lee, “Construction of the basis functions for Nedelec's finite
element spaces for triangular and tetrahedral meshes,” URSI Radio Science
Meeting,
34. J.Y.
Wu and R. Lee, “An argument for the use of tetrahedral and triangular edge
elements for modeling electrically large geometries,” URSI Radio Science
Meeting,
35. T.S. Ibrahim and R. Lee, “Simulation of radio frequency coils for super high field magnetic resonance imaging,” URSI Radio Science Meeting, Montreal, Canada, July 1997.
36. J.W.
Nehrbass and R. Lee, “Optimal finite difference subgridding techniques applied
to the Helmholtz equation,” URSI Radio Science Meeting,
1998
37. K.
Rama Rao and R. Lee, “An optimal edge based finite difference solution to the
vector Helmholtz equation in two dimensions,” CEFC'98,
38. R.
Lee and P. Sadayappan, “The advantages of domain decomposition for FEM,” URSI
Radio Science Meeting,
39. J.Y.
Wu, J.W. Nehrbass, and R. Lee, “A comparison of PML for TVFEM and FDTD,” 4th
Int. Workshop on FEM for Microwave
1999
40. R.
Lee, S. Dvorak, and A.C. Cangellaris, ``Transient plane wave scattering from
objects near lossy ground with FDTD,” URSI Radio Science Meeting,
41. Y.
Zhu and R. Lee, “TVFEM analysis of infinite and finite periodic structures for
radiation and scattering,” URSI Radio Science Meeting,
42. T.S. Ibrahim, R. Lee, B.A. Baertlein, A. Kangarlu, and P.M.L. Robitaille, “Reduction of SAR and improvement of the magnetic field homogeneity using 4-ports excitation for high-field MRI,” URSI General Assembly, Toronto, Canada, August 1999.
43. R.
Lee, T.S. Ibrahim, B.A. Baertlein, A. Kangarlu, and P.M.L. Robitaille,
“Magnetic field homogeneity and SAR issues: A study of the TEM resonator from
3T to 9T,” URSI General Assembly,
2000
44. R.D.
Slone, J.F. Lee and R. Lee, “A comparison of some model orderreduction
techniques,” 5th International Workshop on Finite Elements for Microwave
Engineering,
45. K.
Rama Rao, R. Lee and C. C. Chen, “Numerical Modeling of an Ultra-Wide Bandwidth
Dielectric Rod Antenna,” URSI Radio
Science Meeting,
46. T.S.
Ibrahim, R. Lee, B.A. Baertlein, and P.-M.L. Robitaille, “Calculation and
experimental validation of induced EM fields inside a human head: A study at
ultra high-field MRI,” URSI Radio Science Meeting,
2001
47. R.D. Slone, J.F. Lee and R. Lee, “What is Model Order Reduction?”, 2001 URSI Radio Science Meeting Digest, pp. 59, Boston, MA, July 2001.
48. K.H.
Lee, C-C. Chen, and R. Lee, “Investigation of the scattering characteristics of
subsurface UXO for classification,” URSI Radio Science Meeting Digest, pp. 103,
49. J.F.
Lee and R. Lee, “Adaptive mesh refinement for vector finite element methods,”
URSI Radio Science Meeting Digest, pp. 12,
50. J.F.
Lee, R.J. Burkholder, P.H. Pathak, and R. Lee, “Higher order loop-star basis
functions for method of moment computations,” URSI Radio Science Meeting
Digest, pp. 361,
2002
51. R.D. Slone, J.F. Lee, and R. Lee, “Fast Frequency Sweep of a Wide-Band Bowtie Antenna Modeled using a 3D Tangentially Continuous Vector FEM and Solved with MGAWE Model Order Reduction,” APS/URSI, San Antonio, Texas, June 2002.
52. S.C. Lee, J.F. Lee, and R. Lee, “Higher Order Curl Conforming Vector Finite Elements for Analyzing Wave Guiding Structures,” APS/URSI, San Antonio, Texas, June 2002.
53. K.-H. Lee, C.-C. Chen, F. L. Teixeira, and R. Lee, “Numerical study of scattering signatures of subsurface UXOs employing novel ultrawideband antennas,” 2002 USNC/URSI National Radio Science Meeting Digest, p. 309, San Antonio, TX, June 2002.
54. J.
F. Lee, R. Lee, and F.L. Teixeira, “Multigrid FEM using Schwarz preconditioners
and hierarchical high-order Whitney-like elements,” Proceeding of the 2002
Progress in Electromagnetics Research Symposium (PIERS), p. 710,
55. R. Lee, F.L. Teixeira, S. Wang, and J.-F. Lee, “Grid refinement approaches for the finite difference time domain method,'' XXVIIth General Assembly of the International Union of Radio Science (URSI) Program, p. 39, Maastricht, Netherlands, August 17-24, 2002.
56. J.-F. Lee, R. Lee, and F.L. Teixeira, “Inexact Helmholtz splitting with Schwarz methods for solving time-harmonic Maxwell equations,” XXVIIth General Assembly of the International Union of Radio Science (URSI) Program, p. 39, Maastricht, Netherlands, August 17-24, 2002.
57. R.
Lee, P. Pathak, and J.F. Lee, “Hybrid methods for solving electromagnetic
problems,” XXVIIth General Assembly of the International Union of Radio Science
(URSI) Program,
2003
58. S.
Wang, R. Lee, F.L. Teixeira and J.F. Lee, “A Hybrid Finite Element Time
Domain/Finite Difference Time Domain Approach for Electromagnetic
Modeling", Progress in Electromagnetics Research Symposium,
59. K.H.
Lee, C-C. Chen and R. Lee, “A Novel UWB Dual-Polarized Tapered Chamber Feed
Design using FDTD method,” Antenna Measurement and Techniques Association
(AMTA),
60. K.H.
Lee, C-C. Chen and R. Lee, “Design of Dielectric Rod Antenna for Near Field
Probe,” Antenna Measurement and Techniques Association (AMTA),
61. K.H. Lee, C-C. Chen and R. Lee, "Development of Dielectric Horn Antenna(DHA) for Compact range feed," Antenna Measurement and Techniques Association (AMTA), Irvine, CA, Oct. 2003.
2004
62. S.
Wang, R. Lee, F.L. Teixeira, and J.F. Lee, “Modified Basis for Perfectly
Matched Layer in the Finite Element Time Domain Method,” 7th Workshop on Finite
Elements for Microwave Engineering - Antennas, Circuits and Devices,
63. K-H.
Lee, C-C. Chen, and R. Lee, “Development of Dual Polarized UWB Dielectric Horn
Antenna (DHA),” URSI Radio Science Meeting,
64. Y.
Srisukh and R. Lee, “A p-Refinement Approach for Finite Element Time Domain
Method,” 2004 Progress in Electromagnetic Research Symposium,
65. K-H.
Lee, C-C. Chen, and R. Lee, “Update on a Novel Dual Polarized Taper Chamber
Feed Design,” Antenna Measurement and Techniques Association (AMTA) 2004,
2005
66. K-H.
Lee, C-C. Chen, and R. Lee, “A Novel Dual Polarized Feed Design for Enhancing
Tapered Chamber Performance,” URSI National Radio Science Meeting,
67. Y. Srisukh and R. Lee, "P-refinement for the finite element time domain method," Electromagnetic Code Consortium Meeting, Wright Patterson Air Force Base, May 2005.
68. R.
Chilton and R. Lee, “FEM analysis of parallel plate waveguides loaded with
magnetic photonic crystals (MPC's),” URSI Radio Science Meeting,
69. Y.
Srisukh and R. Lee, “A three dimensional p-refinement approach to finite
element time domain method,” URSI Radio Science Meeting,
70. N.V.
Venkatarayalu, R. Lee, G.Y. Beng, and L.W. Li, “Time domain finite element
solution using hanging Variables on rectangular edge elements,” URSI Radio
Science Meeting,