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Sonjoy Das, Postdoctoral Fellow Department of Aerospace and Mechanical Engineering University of Southern California (USC)     Office       Kaprielian Hall, Room 130     University of Southern California     3620 S. Vermont Avenue     Los Angeles, CA 90089, USA       Contact Information       Phone :   1-213-740-9165     Fax     :   1-213-740-1426 (Attn: Sonjoy Das)     Email  :   sdas{at}usc*edu [please replace * with . (dot) and {at} with @]

Professional Profile

    Background in stochastic simulation, probabilistic mechanics and structural dynamics. Four years of industrial experience. Three semesters of experience as Teaching assistant/Grader.

Research Interests

Professional Preparation

• Doctorate of Philosophy, May 2008, Department of Civil and Environmental Engineering, University of Southern California

  • Thesis Title: Model, Identification & Analysis of Complex Stochastic Systems: Applications in Stochastic Partial Differential Equations and Multiscale Mechanics. (Research supervisor: Roger G. Ghanem.). Dissertation. BibTex. [I initially started my PhD in the Department of Civil Engineering at the Johns Hopkins University in September, 2002 and, eventually transferred to USC in August, 2005.].

   

• Masters of Science in Engineering, May 2007, Department of Applied Mathematics and Statistics, The Johns Hopkins University.

  • Thesis Title: An Efficient Calculation of Fisher Information Matrix: Monte Carlo Approach using Prior Information. (Research supervisor: James C. Spall.). Thesis. BibTex.

   

• Masters of Science in Engineering, March 2001, Department of Civil Engineering, IISc., Bangalore, India.

  • Thesis Title: Vibration Energy Flow Analysis in Randomly Parametered Coupled Plate Structures using Green's Function Coupling Technique (Research supervisor: C. S. Manohar) (Abstract)

   

• Bachelor of Engineering, July 1995, Department of Civil Engineering, Bengal Engineering College (Deemed University), Howrah, West Bengal, India.

Past Professional Association

• Scientist, November 2001 - July 2002, Structure Group, ISRO Satellite Centre, Indian Space Research Organisation, Bangalore, India.

   

• Junior Research Fellow, April 2001 - July 2001, Council of Scientific and Industrial Research, Department of Civil Engineering, IISc, Bangalore,India

   

• Assistant Civil Engineer, November 1995 - July 1998, M. N. Dastur & Co. Ltd., Calcutta, India.

Selected Publications/Conference Proceedings/Technical Reports

1. Sonjoy Das and Roger Ghanem, ``A Bounded Random Matrix Approach Applied to Nonparametric Homogenization of Heterogeneous Material," to be submitted to Journal of the Mechanics and Physics of Solids, 2008.

2. Sonjoy Das, James C. Spall and Roger Ghanem, ``An Efficient Calculation of Fisher Information Matrix: Monte Carlo Approach using Prior Information," to be submitted to the Journal of the Royal Statistical Society: Series B (Statistical Methodology), 2008 (a shorter version available in the Proceedings of the 46th IEEE Conference on Decision and Control, New Orleans, LA, Dec 12--14, 2007).

3. Roger Ghanem and Sonjoy Das, ``Hybrid Representations of Coupled Nonparametric and Parametric Models with Real and Complex System Matrices," submitted to the AIAA Journal, 2008.

4. Sonjoy Das, Roger Ghanem and Steven Finette, ``Polynomial Chaos representation of spatio-temporal random fields from experimental measurements," submitted to Journal of Computational Physics, 2008.

5. Sonjoy Das, Roger Ghanem and James C. Spall, ``Asymptotic Sampling Distribution for Polynomial Chaos Representation from Data: A Maximum Entropy and Fisher information approach," SIAM Journal on Scientific Computing, v 30, No. 5, pp. 2207-2234, 2008, doi: 10.1137/060652105. BibTex. If your institute subscribes to the online version of this journal, you should have access to the full paper here.

6. Sonjoy Das and Roger Ghanem, ``Hybrid representations for complex dynamical stochastic systems: coupled non-parametric and parametric models," Proceedings of the 6h international conference on structural dynamics (Semi-plenary Lecture in Eurodyn Conference by Roger Ghanem), ed. C. Soize and G.I. Schuëller, v.1, pp.53-60, Paris, France, 4-7 September, 2005.

7. Sonjoy Das and Roger Ghanem, ``Uncertainty analysis for surface ship subjected to underwater detonation," Proceedings of the IMAC-XXII Conference & Exposition on Structural Dynamics, Dearborn, Michigan, 2004.

8. Sonjoy Das and C S Manohar, ``Prediction of vibration energy flow variability in random built-up structures," Proceedings of the 74th Shock and Vibration Symposium, San Diego, CA, 2003.

9. P. Geena George, K Renji and Sonjoy Das, ``Acoustic tests and Sine vibration tests on solar panel of METSAT," Report No. ISRO-ISAC-METSAT-TE-0718 and ISRO-ISAC-METSAT-TE-0723 (restricted), ISRO Satellite Centre, Indian Space Research Organisation, Bangalore, 2002.

10. Sonjoy Das and C S Manohar, ``Evaluation of coupling loss factor matrix for discretely connected plate assemblies and modeling of vibration energy flow," Final report for Project number ISTC/MCV/CSM/100, ISRO-IISC Space Technology Cell, Indian Institute of Science, Bangalore, March 2001.

A few other scientific and research articles/reports (not mine) that you may like

1. A report written from a mathematical perspective and strongly cautions against the over-reliance on citation statistics such as the impact factor and h-index. (Summary)

Chronology (click here)

Scholastic Lineage (click here)

Other Things (Clicking the image below will disclose a few other things about my non-professional life.).

This page was last updated on 09/06/2008 01:41:09 PM -0700