Narayan Kovvali, Assistant Research Scientist

Contact Information:

School of Electrical, Computer, and Energy Engineering
Arizona State University
GWC Building, Box 875706,
Tempe, Arizona 85287-5706, United States.
Email: zzzzzzz.zzzzzzz@asu.edu     (replace z's with Narayan.Kovvali)

Curriculum Vitae:

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Education:

Ph.D., Electrical Engineering
Duke University, Durham, North Carolina, United States.              December 2005

M.S., Electrical Engineering
Duke University, Durham, North Carolina, United States.              September 2002

B.S., Electrical Engineering
Indian Institute of Technology, Kharagpur, India.          July 2000

Research Interests:

Statistical signal processing, Monte Carlo methods, scientific computing, convex optimization, compressed sensing.

Papers:

• D. Chakraborty, N. Kovvali, A. Papandreou-Suppappola, and A. Chattopadhyay, ``Adaptive Learning for Damage Classification in Structural Health Monitoring'', 43rd Asilomar Conference on Signals, Systems and Computers, Pacific Grove, California, 2009.
• J. Zhang, W. Zhou, N. Kovvali, A. Papandreou-Suppappola, and A. Chattopadhyay, ``On the Use of the Posterior Cramér-Rao Lower Bound for Damage Estimation in Structural Health Management'', ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Oxnard, California, 2009.
• W. Zhou, N. Kovvali, A. Papandreou-Suppappola, P. Peralta, and A. Chattopadhyay, ``Progressive Damage Estimation using Sequential Monte Carlo Techniques'', 7th International Workshop on Structural Health Monitoring, Stanford, California, 2009.
• L. Channels, D. Chakraborty, B. Butrym, N. Kovvali, J. Spicer, A. Papandreou-Suppappola, M. Afshari, D. Inman, and A. Chattopadhyay, ``A Comparative Study of Fatigue Damage Sensing in Aluminum Alloys using Electrical Impedance and Laser Ultrasonic Methods'', Proc. of SPIE, vol. 7295, p. 72950Q, 2009.
• A. Chattopadhyay, A. Papandreou-Suppappola, P. Peralta, and N. Kovvali, ``A Multidisciplinary Approach to Structural Health Monitoring and Damage Prognosis of Aerospace Hotspots'', The Aeronautical Journal, in print, 2009.
• W. Zhou, N. Kovvali, W. Reynolds, A. Papandreou-Suppappola, A. Chattopadhyay, and D. Cochran, ``On the Use of Hidden Markov Modeling and Time-frequency Features for Damage Classification in Composite Structures'', Journal of Intelligent Material Systems and Structures, Special Issue on Information Management in Structural Health Monitoring, vol. 20, pp. 1271-1288, July 2009.
• D. Chakraborty, N. Kovvali, J. Wei, A. Papandreou-Suppappola, D. Cochran, and A. Chattopadhyay, ``Damage Classification Structural Health Monitoring in Bolted Structures Using Time-frequency Techniques'', Journal of Intelligent Material Systems and Structures, Special Issue on Information Management in Structural Health Monitoring, vol. 20, pp. 1289-1305, July 2009.
• D. Chakraborty, W. Zhou, D. Simon, N. Kovvali, A. Papandreou-Suppappola, D. Cochran, and A. Chattopadhyay, ``Time-Frequency Methods For Structural Health Monitoring'', Sensor, Signal and Information Processing (SenSIP) Workshop, Sedona, Arizona, May 2008.
• L. Channels, D. Chakraborty, D. Simon, N. Kovvali, J. Spicer, A. Papandreou-Suppappola, D. Cochran, P. Peralta, and A. Chattopadhyay, ``Ultrasonic sensing and time-frequency analysis for detecting plastic deformation in an aluminum plate'', Proc. of SPIE, vol. 6926, p. 69260P, 2008.
• W. Zhou, W. D. Reynolds, A. Moncada, N. Kovvali, A. Chattopadhyay, A. Papandreou-Suppappola, and D. Cochran, ``Sensor fusion and damage classification in composite materials'', Proc. of SPIE, vol. 6926, p. 69260N, 2008.
• D. Chakraborty, S. Soni, J. Wei, N. Kovvali, A. Papandreou-Suppappola, D. Cochran, and A. Chattopadhyay, ``Physics based modeling for time-frequency damage classification'', Proc. of SPIE, vol. 6926, p. 69260M, 2008.
• N. Kovvali, W. Lin, and L. Carin, ``Hybrid Prolate Pseudospectral Methods on Chebyshev and Legendre Grids I - A Preview''. In F. Liu, G. N'Guerekata et al., editors, Discrete and Computational Mathematics, pp. 121-137, Nova Science Publishers, New York, 2008.
• W. Zhou, D. Chakraborty, N. Kovvali, A. Papandreou-Suppappola, D. Cochran, and A. Chattopadhyay, ``Damage classification for structural health monitoring using time-frequency feature extraction and continuous hidden Markov models'', Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, California, November 2007, pp. 848-852.
• W. Zhou, N. Kovvali, A. Papandreou-Suppappola, D. Cochran, and A. Chattopadhyay, ``Hidden Markov model based classification of structural damage'', Proc. of SPIE, vol. 6523, p. 652311, 2007.
• N. Kovvali, S. Das, D. Chakraborty, D. Cochran, A. Papandreou-Suppapola, and A. Chattopadhyay, ``Time-frequency based classification of structural damage'', 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, Hawaii, April 2007, pp. 2047-2055.
• Z. Zhao, N. Kovvali, W. Lin, C.-H. Ahn, L. Couchman, and L. Carin, ``Volumetric Fast Multipole Method for Modeling Schrödinger's Equation", Journal of Computational Physics, vol. 224, no. 2, pp. 941-955, June 2007.
• W. Lin, N. Kovvali, and L. Carin, ``Pseudospectral method based on prolate spheroidal wave functions for semiconductor nanodevice simulation", Computer Physics Communications, vol. 175, no. 2, pp. 78-85, July 2006.
• N. Kovvali, W. Lin, Z. Zhao, L. Couchman, and L. Carin, ``Rapid Prolate Pseudospectral Differentiation and Interpolation with the Fast Multipole Method", SIAM Journal on Scientific Computing, vol. 28, no. 2, pp. 485-497, March 2006.
• N. Kovvali, W. Lin, and L. Carin, ``Pseudospectral Method Based on Prolate Spheroidal Wave Functions for Frequency-Domain Electromagnetic Simulations", IEEE Transactions on Antennas and Propagation, vol. 53, no. 12, pp. 3990-4000, December 2005.
• W. Lin, N. Kovvali, and L. Carin, ``Direct Algorithm for Computation of Derivatives of the Daubechies Basis Functions", Applied Mathematics and Computation, vol. 170, no. 2, pp. 1006-1013, November 2005.
• N. Kovvali, W. Lin, and L. Carin, ``Image Technique for Multiresolution Time-Domain using Non-Symmetric Basis Functions", Microwave and Optical Technology Letters, vol. 47, no. 1, pp. 44-47, October 2005.
• W. Lin, N. Kovvali, and L. Carin, ``Ridgelet-Based Implementation of Multiresolution Time Domain", IEEE Transactions on Antennas and Propagation, vol. 53, no. 8, pp. 2688-2699, August 2005.
• N. Kovvali, W. Lin, and L. Carin, ``Order of Accuracy Analysis for Multiresolution Time-Domain using Daubechies Bases", Microwave and Optical Technology Letters, vol. 45, no. 4, pp. 290-293, May 2005.
• N. Kovvali and L. Carin, ``Analysis of wideband forward looking synthetic aperture radar for sensing land mines", Radio Science, vol. 39, no. 4, July 2004.

Teaching:

Topics in Signal Analysis (MAT/EEE 598), Spring 2007.

Some mentors and colleagues:

Antonia Papandreou-Suppappola, Doug Cochran, Aditi Chattopadhyay, Andreas Spanias, Debejyo Chakraborty, Wenfan Zhou, Anne Gelb, Larry Carin, Qing Liu, Tom Witelski, Svetlana Roudenko, Wenbin Lin, Zhiqin Zhao, Nilanjan Dasgupta