Education

1988-1989 Arizona State University, Postdoctoral Research (Electrical Engineering)
1985-1988 Arizona State University Ph.D. (Electrical Engineering)
1983-1985 Indian Institute of Technology, Kanpur, INDIA, M.Tech. (Electrical Engineering)
1978-1983 Indian Institute of Technology, Bombay, INDIA, B.Tech. (Electrical Engineering)

 

Research Interest

We are a part of the Electrical & Computer Engineering Department at Old Dominion University. Our research spans a wide range of topics including:

• physical electronics;
• computational bio-electrics including ion channels and neural stimulation;
• molecular dynamics;
• semiconductor transport;
• high-field, non-equilibrium processes;
• electrical breakdown in solid dielectrics, liquids and gases, etc.

Our research broadly encompasses modeling and simulations of charge transport, non-equilibrium phenomena, and bio-electrics. Our group has also has used Monte Carlo methods for simulations of high-field transport in bulk and quantum well semiconductors. We also apply molecular dynamics simulations to probe electric-field driven process at cell membranes, including electroporation, Calcium release, and effects of voltage stimulation on the propagation of neural signals. We have authored over 110 journal publications, and over 150 conference papers and presentations. I have been a visiting scientist at Oak Ridge National Laboratory, Philips Laboratory, Motorola and NASA Goddard. I have served as a guest editor for two special issues of the IEEE Transactions on Plasma Science, and am a senior member of the Institute of Electrical and Electronics Engineers (IEEE).

 Further details on our research projects, publications, student members etc. are available at: http://www.lions.odu.edu/~rjoshi/

 

Publications

Pakhomov, A. G., J. F. Kolb, J. A. White, R. P. Joshi, S. Xiao, and K. H. Schoenbach.  2007.  Long-Lasting Plasma Membrane Permeabilization in Mammalian Cells by Nanosecond Pulsed Electric Field (nsPEF).  Bio-Electromagnetics Journal 28, 655.

Chen, N., A. L. Garner, G. Chen; Y. Jing, Y. Deng, R. J. Swanson, J. F. Kolb, R. J. Swanson, S. J Beebe, R. P. Joshi, and K. H Schoenbach.  2007.  Nanosecond Electric Pulses Penetrate the Nucleus and Enhance Speckle Formation.  Biochemical and Biophysical Research Communications 364, 220.

Schoenbach, K. H., B. Hargrave, R. P. Joshi, J. F. Kolb, C. Osgood, R. Nuccitelli, A. Pakhomov, J. Swanson, M. Stacey, J. A. White, S. Xiao, J. Zhang, S. J. Beebe, P. Blackmore, and E. S. Buescher, "Bioelectric Effects of Nanosecond Pulses.  2007.  IEEE Transactions on Dielectrics and Electrical Insulation 14, 1088 - invited paper.

Garner, A. L., G. Chen, N. Chen; V. Sridhara, J. F. Kolb, R. J. Swanson, S. J Beebe, R. P. Joshi, and K. H Schoenbach.  2007.  Ultrashort Electric Pulse Induced Changes in Cellular Dielectric Properties.  Biochemical and Biophysical Research Communications 362, 139.

Zhao, G., R. P. Joshi,  V. K. Lakdawala,  and  H. Hjalmarson, "Electro-Thermal Simulation Studies for Pulse Induced Energy Absorption in Nano-Crystalline ZnO Varistors," IEEE Trans. Dielectr. and Electr. Insulation 14, 1007 (2007).

Joshi, R. P., A.  Mishra,  J. Song, Q. Hu,  K. H. Schoenbach, and A. Pakhomov, "Self-Consistent Analyses for Potential Conduction Block in Nerves by an Ultra-Short, High-Intensity Electric Pulse," Phys. Rev. E 75, 061906/1-11 (2007).

Pakhomov, A. G., R. Shevin, J. A. White, J. F. Kolb, O. N. Pakhomova, R. P. Joshi, and K. H. Schoenbach.  2007.  Membrane Permeabilization and Cell Damage by Ultrashort Electric Field Shocks.  Archives of Biochemistry and Biophysics 465, 109.

Joshi, R. P., A. Nguyen, V. Sridhara, Q. Hu, R. Nuccitelli, and K. H. Schoenbach.  2007.  Simulations of Intra-Cellular Calcium Release Dynamics in Response to a High-Intensity, Ultra-Short Electric Pulse.  Phys. Rev. E 75, 041920/1-10.

Pliquett, U., R. P. Joshi, V. Sridhara, and K. H. Schoenbach.  2007.  High Electrical Field Effects on Cell Membranes.  Bioelectrochemistry 70, 275.

Zhao, G., R. P. Joshi, V. K. Lakdawala, E. Schamiloglu, and H. Hjalmarson.  2007.  Studies of TiO2 Breakdown Under Pulsed Conditions.  J. Appl. Phys. 101, 026110.

Xiao, S., J. Kolb, M. A. Malik, X. Lu, M. Laroussi, R. P. Joshi, K. H. Schoenbach.  2006.  Electrical Breakdown and Dielectric Recovery of Polar Liquids.  IEEE Trans. Plasma Science 34, 1653.

Hu, Q., S. Viswanadham, R. P. Joshi, J. Kolb, and K. H. Schoenbach.  2006.  Molecular Dynamics Analysis of High Electric Pulse Effects on Bilayer Membranes Containing DPPC and DPPS.  IEEE Trans. Plasma Science 34, 1405.

Mishra, A., R. P. Joshi, K. H. Schoenbach, and C. D. Clarke III.  2006.  A Fast, Parallelized   Computational Approach Based on Sparse LU Factorization for Predictions of Spatial and Time-Dependent Currents and Voltages in Full-Body Bio-Models.  IEEE Trans. Plasma Science 34, 1431- invited paper.

Sridhara, V., R. P. Joshi, and K. H. Schoenbach.  2006.  Microscopic Calculations of Local Lipid Membrane Permittivities and Diffusion Coefficients for Application to Electroporation   Analyses.  Biochemical and Biophysical Research Comm. 348, 643.

Frey, W., J. A. White, R. O. Price, P. F. Blackmore, R. P. Joshi, R. Nuccitelli, S. J. Beebe, K. H.  Schoenbach, and J. Kolb.  2006.  Plasma Membrane Voltage Changes during Nanosecond Pulsed Electric Field Exposure.  Biophysical Journal 90, 3608.

Qian, J., R. P. Joshi, E. Schamiloglu, J. Gaudet, J. R. Woodworth, and J. Lehr.  2006.  Analysis of the Polarity Effects in the Electrical Breakdown of Liquids.  J. Phys. D 39, 359.

Qian, J., R. P. Joshi, E. Schamiloglu, J. Gaudet, J. R. Woodworth, and J. Lehr.  2006.  Analysis of the Polarity Effects in the Electrical Breakdown of Liquids.  J. Phys. D 39, 359.

Qian, J., R. P. Joshi, J. Kolb, K. H. Schoenbach, J. Dickens, A. Neuber, H. Krompholz, E. Schamiloglu, and J. Gaudet.  2005.  Micro-Bubble Based Model Analysis of Liquid Breakdown Initiation By a Sub-Microsecond Pulse.  J. Appl. Phys. 97, 113304.

Hu, Q., R. P. Joshi, and K. H. Schoenbach.  2005.  Simulations of Nanopore Formation and Phosphatidylserine Externalization in Lipid Membranes Subjected to a High-Intensity, Ultra-Short Electric Pulse.  Phys. Rev. E 72, 031902.

Hu, Q., S. Viswanadham, R. P. Joshi, K. H. Schoenbach, S. J. Beebe and P. F. Blackmore.  2005.   Simulations of Transient Membrane Behavior in Cells Subjected to a High-Intensity, Ultra-Short Electric Pulse.  Phys. Rev. E 71, 031914.

Garner, A. L., N. Chen, J. Yang, J. Kolb, R. J. Swanson, S. J. Beebe, R. P. Joshi, and K. H. Schoenbach.  2004.  Time Domain Dielectric Spectroscopy Measurements of HL-60 Cells Suspensions after Microsecond and Nanosecond Electrical Pulses.  IEEE Trans. Plasma Science 32, 2073.

Joshi, R. P., Q. Hu and K. H. Schoenbach, "Modeling Studies of Cell Response to Ultrashort, High-Intensity Electric Fields - Implications for Intracellular Manipulation", IEEE Trans. Plasma Science 32, 1677 (2004).

Beebe, S. J., P. F. Blackmore, J. White, R. P. Joshi, and K. H. Schoenbach.  2004.  Nanosecond Pulsed Electric Fields Modulate Cell Function Through Intracellular Signal Transduction Mechanisms.  Physiological Measurement 25, 1077.

Gaudet, J., R. J. Barker, M. Gundersen, A. Kuthi, A. Neuber, J. Dickens, W. Nunnally, E. Schamiloglu, C. Christodoulou, S. Tyo, K. H. Schoenbach, R. P. Joshi, M. Laroussi, J. Kolb, and R. Vidmar.  2004.  Research Issues in Developing Compact Pulsed Power for High Peak Power Applications on Mobile Platforms.  Proc. IEEE 92, 1144.

Schoenbach, K. H., R. P. Joshi, J. Kolb, N. Chen, M. Stacey, P. Blackmore, E. S. Buescher, and S. J. Beebe.  2004.  Ultrashort Electrical Pulses Open A New Gateway Into Biological Cells". Proc. IEEE 92, 1122.

Chen, N., K. H Schoenbach, J. F. Kolb, R. J. Swanson, A. L. Garner, J. Yang, R. P. Joshi, and S. J. Beebe.  2004.  Leukemia Cell Intracellular Responses to Nanosecond Electric Fields.  Biochemical and Biophysical Research Communications 317, 421.

Joshi, R. P., Q. Hu, K. H. Schoenbach, and S. J. Beebe.  2004.  An Energy-Landscape Model Analysis for Irreversibility and It's Pulse Width Dependence in Cells Subjected to a High-Intensity, Ultrashort Electric Pulse.  Phys. Rev. E 69, 051901.

Joshi, R. P., F. Chen and W. R. Rogers.  2004.  Modeling Electrode-Based Stimulation of Muscle and Nerve by Ultra-Short Electric Pulses", IEEE Trans. Plasma Science 32, 1687.

Joshi, R. P., J. Qian, G. Zhao, J. Kolb, K. H. Schoenbach, J. Gaudet and E. Schamiloglu.  2004.  Are Micro-Bubbles Necessary for the Breakdown of Liquid Water Subjected to a Sub-Microsecond Pulse ?  J. Appl. Phys. 96, 5129.

Joshi, R. P., J. Qian, K. H. Schoenbach, and E. Schamiloglu.  2004.  A Microscopic Analysis for Water Stressed by High Electric Fields in the Pre-Breakdown Regime.  J. Appl. Phys. 96, 3617.

Xiao, S., J. Kolb, S. Kono, S. Katsuki, R. P. Joshi, M. Laroussi, and K. H. Schoenbach.  2004.  High Power Water Switches: Postbreakdown Phenomena and Electrical Recovery", IEEE Trans. Dielectrics and Electrical Insulation 11, 604.

Joshi, R. P., J. Qian, S. Katsuki and K. H. Schoenbach, and E. Schamiloglu.  2003.  Electrical Conduction in Water Revisited: Roles of Field-Enhanced Dissociation and A Reaction-Based Boundary Condition.  IEEE Trans. Dielectrics & Electrical Insulation 10, 225.

Joshi, R. P., Q. Hu, and K. H. Schoenbach.  2003.  Dynamical Modeling of Cellular Response to Short-Duration, High-Intensity Electric Fields.  IEEE Trans. Dielectr. Electr. Insul. 10, 778.

Joshi, R. P., Q. Hu, K. H. Schoenbach, and S. J. Beebe.  2002.  Simulations of Electroporation Dynamics and Shape Deformations in Biological Cells Subjected to High Voltage Pulses.   IEEE Trans. Plasma Sci. 30, 1536.

Joshi, R. P. and K. H. Schoenbach.  2002.  A Mechanism for Membrane Electroporation Irreversibility Under High-Intensity, Ultrashort Electrical Pulse Conditions.  Physical Review E 66, 052901.

Joshi, R. P., Q. Hu, K. H. Schoenbach, and H. P. Hjalmarson.  2002.  Improved Energy Model for  Membrane Electroporation in Biological Cells Subjected to Electrical Pulses.  Phys. Rev. E 65, 041920.

Joshi, R. P., Q. Hu, K. H. Schoenbach, and H. P. Hjalmarson.  2002.  Theoretical Predictions of  Electro-Mechanical Deformation of Cells Subjected to High Voltages For Membrane Electroporation.  Virtual Journal of Biological Physics Research - Membrane Biophysics 3.

Joshi, R. P., Q. Hu, K. H. Schoenbach, and H. P. Hjalmarson.  2002.  Theoretical Predictions of  Electro-Mechanical Deformation of Cells Subjected to High Voltages For Membrane Electroporation.  Phys. Rev. E 65, 021913.

J. Qian, R. P. Joshi, K. H. Schoenbach, E. Schamiloglu, and C. Christodoulou.  2002.  Percolative Model Of Electric Breakdown In Liquid Dielectrics.  IEEE Trans. Plasma Science 30, 1931.

R. P. Joshi, J. Qian and K. H. Schoenbach.  2002.  An Electrical Network Based Time-Dependent Model of Electrical Breakdown In Water.  J. Appl. Phys. 92, 6245.

Joshi, R. P., Q. Hu, R. Aly, K. H. Schoenbach, and H. P. Hjalmarson.  2001.  Self-Consistent Simulations of Electroporation Dynamics in Biological Cells Subjected to Ultrafast Electrical Pulses.  Phys. Review E 64, 11913/01.

R. P. Joshi, F. Mbaye, P. Basappa, S. D. Jang, J. Kim, and J. C. Hall. 2008. Simulation studies of internal mechanisms in the static deflection of a cellulose electroactive paper actuator. J. Appl. Phys. 103, 64912-64919. [PDF]

Copyright (2008) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. It may be found at http://link.aip.org/link/?JAP/103/064912 

Honors and Awards

2007   ODU University Professor

 2007   Who's Who in American Education

 2006   ODU Nominee for Virginia SCHEV Outstanding Faculty Award

 2006   Outstanding Teaching Award, Batten College of Engr. & Tech., ODU

 2005   Martin Black Prize -- Institute of Physics & Engineering in Medicine

 2004   Rufus Tonelson Award for Research, Teaching & Service, ODU

 2003   Outstanding Teaching Award, Dept. of Electrical & Computer Engr., ODU

 2003   Certificate of Appreciation, Air Force Research Laboratory, San Antonio, TX

 2002   18^th Annual Research Award, Old Dominion University

 2002   Research Excellence Award, Dept. of Electrical & Computer Engr., ODU

 2001   Research Excellence Award, College of Engineering, ODU

 1994   Senior Member of the IEEE

 1990   Most Inspiring Faculty Award (College of Engineering), ODU

 1977   National Talent Scholarship, India

 1977   National Merit Award, India

Memberships