Nachiket Hemant Gokhale-
Education
• Ph.D (2007), M.S. (2003), Mechanical Engineering, Boston University, Boston, MA, U.S.A.
• Solved an inverse problem in medical imaging using FEM and adjoint optimization.
• Advisors: Dr. Assad Oberai & Dr. Paul Barbone.
• Research intern May - Aug 2006 at Rensselaer Polytechnic Institute with Dr. Assad Oberai.
• B.E. (2001) Mechanical Engineering, Vishwakarma Institute of Technology, University of Pune, India.
• Graduated first class with distinction in every academic year.
Employment
• Python Consultant, Mar 2021 - present
• Elasticity Imaging using a Convolutional Neural Network (CNN), Mar 2020 - Mar 2021
• Self-employed mathematics tutor, Sept 2018 - Mar 2020
• Entuple Technologies Pvt Ltd (Sept ’16 - Dec’17)
• Prescient Technologies Pvt Ltd (April’15 - Dec’15)
• Software Eng. contractor with Siemens Inc.
• Weidlinger Associates Inc. New York, NY (Dec’06 - Sept’13)
• Project Eng. (Sept’11-Sept’13), Sr. Eng.(Sept’09-Sept’11), Research. Eng.(Dec’06-Sept’09).
Selected Projects
• Machine Learning Solved an inverse problem in biomedical imaging to predict the shear modulus
field of soft-tissue using Convolutional Neural Networks (CNNs) in TensorFlow. Used Python, Numpy and
TensorFlow extensively. Source code available on request.
• GPUs Obtained more than an order of magnitude acceleration for linear elasticity over a single CPU
using CUDA. Accelerated various other material models such as elastoplasticity (CAP) model. Presented
work at conferences and established relationships with other companies and consultants.
• Acoustic Cloaking Acoustic cloaking refers to guiding a sound wave around an object without
scattering rendering the object invisible. I designed special composite materials (Metamaterials) with
anisotropic elastic properties, contributed to several proposals and whitepapers, conducted extensive FEM
analyses, developed custom FEM solvers in C/C++ for calculating effective properties of periodic materials
using asymptotic homogenization and their finite frequency behavior using Bloch-Floquet theory.
• Elastoplasticity I implemented a visco-plastic, pressure dependent damage model with temperature
dependent elastic properties for shells and continuum elements for modeling the response of Aluminum
structures subjected to fire loads. The equations were fully coupled and challenging to solve.
• Structural acoustics Implemented the Zienkiewicz-Newton formulation using matrices (very illconditioned and large) generated from ABAQUS (Simulia) and built reduced order models, used advanced
scientific software toolkits PETSc, SLEPc and MUMPS effectively.
• Structural analysis In collaboration with various team members I built finite element models
using Hypermesh, conducted analyses using in-house and commercial FEM codes (ABAQUS/ANSYS) of
1) Blast protection of the World Trade Center transportation hub 2) Structural analysis of the Jacob K.
Javits Convention Center a 675,000 sq.ft. space frame structure.
Selected Software Skills
• Extremely comfortable in Linux based environments. Adaptable user of various languages and toolkits
as required by the project e.g. C, C++, CUDA, FORTRAN (various flavors), Python, Java, Matlab,
Page 1 of 2
MPI/OpenMP, expert user of high-quality scientific software e.g. TensorFlow, PETSc (linear & non-linear
solvers), SLEPc (eigenvalue solvers), TAO (optimization).
Service
• Reviewer for Inverse Problems (2011, 2012), Physics in Medicine and Biology (2010, 2011, 2012),
Inverse Problems in Engineering and Science (2009, 2012), IEEE Transactions on Medical Imaging (2007,
2008, 2011)
Invited talks
• Norris A. N., Gokhale N. H., Cipolla J. L. Advances in Pentamode Acoustic Metamaterials Naval Undersea Warfare Center, Newport, RI, January 25, 2013.
• Gokhale N.H., Cipolla J. L., Norris A. N., Nagy A. N., Atkatsh K. Acoustic cloak design
Department of Mechanical Engineering, Boston University, Nov 27, 2012.
• Cipolla J. L., Gokhale N. H., Norris A. N., Nagy A. N. Advances in Design of Pentamode
Acoustic Cloaking Metamaterials, Naval Postgraduate School, Monterey, CA, February 12, 2011.
Publications in archived journals
• Gokhale N. H., Cipolla J. L. and Norris A. N. Special transformations for pentamode acoustic
cloaking, Journal of the Acoustical Society of America (JASA), Special Issue on acoustic metamaterials,
Issue 4, pp-,2012.
• Oberai A. A., Gokhale N. H., Goenezen S., Barbone P. E., Hall T. J., Sommer A. M.,
and Jiang J. Linear and non-linear elasticity imaging of tissue in-vivo: Demonstration of feasibility,
Physics in Medicine and Biology 54:1191 (2009).
• Gokhale N. H., Oberai A. A. and Barbone P. E. Solution of the non-linear elasticity imaging
inverse problem: the compressible case, Inverse Problems 24:045010 (2008).
• Oberai A. A., Gokhale N. H., Doyley M. M. and Bamber J. C. Evaluation of the adjoint
equation based algorithm for elasticity imaging, Physics in Medicine and Biology- (2004).
• Barbone P. E. and Gokhale N. H. Elastic Modulus Imaging: On the uniqueness and nonuniqueness of the elastography inverse problem in two dimensions, Inverse Problems 20:283-296 (2004).
• Oberai A. A., Gokhale N. H. and Feijóo G. R. Solution of inverse problems in elasticity
imaging using the adjoint method, Inverse Problems 19:297-313 (2003).
Selected Conference Presentations
• Gokhale, N. H., Cipolla J. L., Norris A. N., Nagy, A. J. Design of pentamode acoustic
metamaterials, USNCCM, Raleigh, NC, July 2013.
• Gokhale, N. H., Cipolla J. L., Norris A. N., Nagy, A. J., and Banks R. A Piezoelectric
Metamaterial with applications to ultrasound transducer design, MRS Fall Meeting, Nov’12, Boston, MA.
• Cipolla J.C., Gokhale N. H., Norris A. N., Nagy A. J. Advances in design of pentamode
acoustic cloaking materials, ASME IMECE, Denver, CO, Nov 2011.
• Gokhale N. H., Cipolla J.C., Norris A. N. Design of pentamode acoustic materials using homogenization and the adjoint approach, USNCCM, Minneapolis, MN, July 2011.
• Gokhale N. H., Mould J. C, Abboud N. N., Krause R., Carcione L., Cipolla J. L.
Accelerating explicit FEM simulations of shock and blast using the GPU, NVIDIA GPU Technology Conference (GTC) 2010, September 20-23, San Jose, California.
• Gokhale N. H., Oberai A. A. and Barbone P. E. Non-Linear Elasticity Imaging, US National
Congress on Computational Mechanics (USNCCM), Austin TX, July 2005.
• Gokhale N. H., Richards M. S., Oberai A. A., Barbone P. E. and Doyley M. M. Simultaneous elastic image registration and elastic modulus reconstruction, IEEE International Symposium on
Biomedical Imaging (ISBI) Arlington, VA April 2004.
Page 2 of 2
