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Overview

The physical sciences research area combines the fields of material design, discovery, and deployment with advanced information systems. This inter-disciplinary research group contributes to material sciences at every stage by conducting experiments, creating models based on the observations, and then building on these models to simulate various scenarios.

One of the major research agendas of the group is to develop modeling paradigms to study the behavior of materials at the lower length scale, and correlate the observations to the micro, meso, and macro scales in order to design and develop novel, better materials.

Fields

The groups working as part of this research area include:

Biomimesis: This team is currently engaged in the creation of: in-silico human skin for the virtual testing of pharmaceutical and personal care products; mechanical modelling of human skin to study muscle movement; and a data- and physics-based model of taste sensing in humans for the design and development of taste enhancers and flavors

Materials informatics: This group combines data-driven and physics-based approaches for the development of comprehensive platforms that can leverage large amounts of simulated and experimental data for the design of a specific class of materials

Integrated computational materials engineering (ICME): The ICME team is working on research for the screening and design of novel corrosion inhibitors and multi-scale models of polymer nanocomposites

Recovery of rare earths from e-waste: As part of a collaborative project between India and France, this team is working on the development of an in-silico tool for the screening and design of extractants and solvents for separation of rare earth metals from electronic waste

Functional coating: This group is working on a data-based screening paradigm to help design and develop coatings with the required functionality in a shorter period of time

Li-ion battery: This team is designing a modeling framework to estimate the state of health and charge of Li-ion batteries deployed in electric vehicles

People & Patents

Research team: Led by Principal Scientist Beena Rai, the team includes Rakesh Gupta; Naga Neehar Dingari; Soumyadipta Maiti; Sriram G.; Shankar Kausley; and Mahesh Mynam

Academic partners: IIT Bombay, India; IIT Kanpur, India; National Metallurgical Laboratory Jamshedpur, India; Institut de Chimie Séparative de Marcoule, France; Georgia Institute of Technology, USA; University of Florida, USA; and Harvard University, USA

Patents: This research group has secured two patents and applied for 25 

Key Publications since 2016

  1. Molecular Simulations: Small Manipulations for Larger Gains

    Invited Talk

    30/06/2016

    Beena Rai,

  2. Gupta R and Rai B. Effect of Size and Surface Charge of Gold Nanoparticles on their Skin Permeability

    Nature Scientific Reports

    20/02/2017

    Rakesh Gupta

  3. Multiscale Skin Modeling for in-silico Testing of Pharmaceuticals and Cosmetics

    Annual Meeting of Skin Forum

    06/05/2016

    Rakesh Gupta, Balarama Sridhar, Beena Rai,

  4. Multi-Scale Modelling in Materials Science and Engineering

    National Metallurgists' Day Annual Technical Meeting

    30/10/2016

    Beena Rai

  5. Modelling & Simulations based in-silico Platform for Design, Development & Testing of Drug Delivery Systems

    Annual International Symposium on Drug Delivery Systems

    31/01/2017

    Rakesh Gupta, Balarama Sridhar, Beena Rai,

  6. Multi-scale Modelling of Drug Release through Polymer Hydrogels

    Controlled Release Society

    04/05/2016

    Aditya Pareek, Balarama Sridhar, Rakesh Gupta, Beena Rai, Venkataramana Runkana,

  7. Molecular Dynamics Simulation of Skin Lipids: Effect of Chain Length of Ceramide over Bilayer Properties

    The Journal of Physical Chemistry B

    02/11/2016

    Rakesh Gupta, Balarama Sridhar, Beena Rai

  8. Molecular Dynamics Simulation Study of Permeation of Molecules through Skin Lipid Bilayer

    The Journal of Physical Chemistry B

    02/08/2016

    Rakesh Gupta, Balarama Sridhar, Beena Rai

  9. Penetration of Gold Nanoparticles through Human Skin: Unraveling Its Mechanisms at the Molecular Scale

    The Journal of Physical Chemistry B

    18/06/2016

    Rakesh Gupta, Beena Rai

  10. In-silico Skin Model: A Tool for Virtual Testing of Formulations

    IEEE International Conference on High Performance Computing

    15/11/2016

    Rakesh Gupta, Balarama Sridhar, Beena Rai,

  11. Molecular Dynamics Simulation Study of Translocation of Fullerene C60 through Skin Bilayer

    Royal Society of Chemistry Nanoscale

    18/02/2017

    Rakesh Gupta, Beena Rai

  12. Transdermal Cellular Membrane Penetration of Protein with Gold Nanoparticle: A Molecular Dynamics Study

    Royal Society of Chemistry Physical Chemistry Chemical Physics Journal

    18/02/2017

    Rakesh Gupta, Beena Rai

  13. In-Silico Skin Model: A Multiscale Simulation Study of Drug Transport

    Journal of Chemical Information and Modeling

    18/07/2017

    Kishore Gajula, Rakesh Gupta, Balarama Sridhar, Beena Rai

  14. Molecular mechanism of transdermal co delivery of interferon alpha protein with gold nanoparticle a molecular dynamics study

    Journal of Molecular Simulation

    08/08/2017

    Rakesh Gupta, Beena Rai

  15. In-silico skin: Model development, validation and predictions

    Gordan Research Conference - Barrier Function of Mammalian skin

    22/06/2017

    Rakesh Gupta, Balarama Sridhar, Kishore Gajula, Beena Rai

  16. An Integrated Platform for in-silico Design and Development of Transdermal Drug Delivery Systems

    Annual International Symposium on Drug Delivery Systems

    15/04/2017

    Beena Rai, Rakesh Gupta, Balarama Sridhar, Kishore Gajula

  17. In-silico skin: Model development, validation and predictions

    Martini Summer Workshop

    31/07/2017

    Balarama Sridhar, Rakesh Gupta, Kishore Gajula, Beena Rai

  18. QSAR Modeling for Prediction of Sweetness of Compounds

    Indian Chemical Engineering Congress

    23/11/2017

    Anukrati Goel, Kishore Gajula, Rakesh Gupta, Beena Rai

  19. Effect of Ceramide types on Bilayer Structure and Transport Properties

    CompFlu

    05/10/2017

    Yogesh Badhe, Rakesh Gupta, Beena Rai

  20. Multiscale Modeling of Drug Transport through Human Skin Stratum Corneum

    AIChE Annual Meeting

    24/08/2017

    Beena Rai, Balarama Sridhar, Rakesh Gupta, Kishore Gajula

  21. A Multi-Scale Modelling Framework of Skin: Application in Drug Transport

    CompFlu

    16/11/2017

    Beena Rai, Rakesh Gupta, Balarama Sridhar, Kishore Gajula, Yogesh Badhe

  22. In-silico skin: Model development and predictions

    AIChE Annual Meeting

    22/09/2017

    Kishore Gajula, Balarama Sridhar, Rakesh Gupta, Beena Rai,

  23. Nanocoolants for Engine Cooling System, Accepted for presentation in International conference on Heat Transfer

    Fluid mechanics and Thermodynamics

    14/04/2016

    Deepak Shyamsunder Jain, Santosh Vasant, Beena Rai

  24. Large Scale Synthesis of Nanocoolant,Asian Particle Technology Symposium

    31/03/2017

    Santosh Vasant, Deepak Shyamsunder Jain, Beena Rai

  25. Quantitative Phase Estimation of Iron Ores Using Chemical Assays and Thermo-Gravimetric DataNational Seminar on Characterization - Importance in Mineral Industry

    04/07/2016

    Beena Rai, Tammishetti Venugopal, Sivakumar Subramanian, Dharmendr Kumar, Pradip,

  26. Numerical simulations study to understand the settling behavior of iron ore slimes for effective beneficiations

    Indian Chemical Engineering Congress

    15/11/2016

    Tammishetti Venugopal, Aditya Pareek, Venkataramana Runkana, Beena Rai,

  27. QUANTITATIVE ESTIMATION OF MINERALS IN IRON ORES USING CHEMICAL ASSAYS AND THERMO-GRAVIMETRY ANALYSIS DATA

    International Mineral Processing Congress

    04/05/2016

    Tammishetti Venugopal, Sivakumar Subramanian, Dharmendr Kumar, Beena Rai, Pradip

  28. EFFECT OF GRINDING CONDITIONS ON SELECTIVE DISPERSION FLOCCULATION OF HIGH ALUMINA CONTAINING IRON ORE SLIMES

    International Mineral Processing Congress

    04/05/2016

    Dharmendr Kumar, Tammishetti Venugopal, Beena Rai, Pradip

  29. Design and development of Reagents for the Beneficiation of High Alumina Containing Indian Iron Ore Slimes: A Density Functional Theory Approach

    International Seminar on Mineral Processing Technology

    10/10/2016

    Dharmendr Kumar, Vinay Jain, Pradip, Beena Rai

  30. Selective Flocculation of Iron Ore Slimes: Results of Successful Pilot Plant Trials at Tata Steel, Noamundi

    Transactions of Indian Institute of Metals

    16/11/2016

    Tammishetti Venugopal, Dharmendr Kumar, Beena Rai, Pradip

  31. Modeling self-assembly of surfactants at interfaces

    Current Opinion in Chemical Engineering

    04/01/2017

    Beena Rai, Pradip

  32. Beneficiation of Alumina Rich Indian Iron Ore Slimes: Exploring the Selective Dispersion-Flocculation Route

    National Metallurgists' Day Annual Technical Meeting

    01/09/2017

    Beena Rai, Vinay Jain, Tammishetti Venugopal, Dharmendr Kumar, Pradip

  33. Evaluation of commercial reagent as selective flocculant for beneficiation of iron ore slimes

    National Metallurgists' Day Annual Technical Meeting

    01/09/2017

    Dharmendr Kumar, Tammishetti Venugopal, Beena Rai

  34. CHITOSAN AS A SELECTIVE FLOCCULANT FOR BENEFICIATION OF HIGH ALUMINA CONTAINING INDIAN IRON ORE SLIMES: A THEORETICAL AND EXPERIMENTAL STUDY

    International Mineral Processing Congress

    21/06/2018

    Dharmendr Kumar, Vinay Jain, Beena Rai, Tammishetti Venugopal

  35. EVALUATION OF A COMMERCIAL REAGENT IN THE SELECTIVE FLOCCULATION OF INDIAN IRON ORE SLIMES

    International Mineral Processing Congress

    21/06/2018

    Dharmendr Kumar, Beena Rai, Tammishetti Venugopal

  36. Can carboxymethyl cellulose be used as a selective flocculant for beneficiating alumina-rich iron ore slimes A density functional theory and experimental studyMinerals Engineering

    22/02/2018

    Dharmendr Kumar, Beena Rai, Vinay Jain

  37. Guar gum as a selective flocculant for the beneficiation of alumina rich iron ore slimes: Density functional theory and experimental studies

    Minerals Engineering

    20/03/2017

    Vinay Jain, Beena Rai, Pradip, Dharmendr Kumar, Tammishetti Venugopal,

  38. Carboxymethyl Cellulose as a Green Corrosion Inhibitor for Steels- A Density Functional Theory Study

    National Metallurgists' Day Annual Technical Meeting

    09/04/2016

    Dharmendr Kumar, Vinay Jain, Beena Rai

  39. Search for Novel Green Corrosion Inhibitors for Copper- A Density Functional Theory Study

    National Metallurgists' Day Annual Technical Meeting

    04/04/2016

    Vinay Jain, Beena Rai

  40. Unravelling the mechanisms of corrosion inhibition of iron by henna extract: A density functional theory study

    Corrosion Science

    10/07/2018

    Dharmendr Kumar, Vinay Jain, Beena Rai

  41. Unravelling the Corrosion Inhibition Mechanism of Carboxymethyl Cellulose on Iron Surface Using DFT

    CORCON

    03/08/2017

    Dharmendr Kumar, Vinay Jain, Beena Rai

  42. Design and Development of Novel Corrosion Inhibitors: A Quantum Chemical and Molecular Dynamics Study

    CORCON

    21/08/2018

    Dharmendr Kumar, Vinay Jain, Beena Rai

  43. In-Silico Model for Predicting the Corrosion Inhibition Efficiency of Steel Inhibitors

    CORROSION

    31/12/2018

    Abhishek Agarwal

  44. Thiourea Derivatives as Steel Corrosion Inhibitors: Density Functional Theory and Experimental Studies

    CORROSION

    31/12/2018

    Venkata Muralidhar K

  45. Understanding Synergistic Effects between Corrosion Inhibitor Molecules using Density Functional Theory

    CORROSION

    16/12/2019

    Dharmendr Kumar, Vinay Jain, Beena Rai,

  46. Reduction of toxic thiourea usage by green and abundant guar gum for steel corrosion inhibition

    CORCON

    30/07/2018

    Venkata Muralidhar K, Vinay Jain, Beena Rai

  47. Materials Design in Digital Era: Challenges and Opportunities

    Transactions of Indian Institute of Metals

    28/04/2019

    Deepak Shyamsunder Jain, Vinay Jain, Dharmendr Kumar, Beena Rai

  48. Amino Acids as Copper Corrosion Inhibitors: A Density Functional Theory Approach

    Applied Surface Science

    25/02/2020

    Dharmendr Kumar, Beena Rai, Vinay Jain

  49. Operability Analysis using Manifold Computation for High Dimensional Process Systems – Steel Making (Ladle)

    National Metallurgists' Day Annual Technical Meeting

    03/10/2016

    Jayanth Mondi, Rishabh Shukla, Sivakumar Subramanian

  50. Process Operability Analysis of High Dimensional Systems

    AIChE Annual Meeting

    14/07/2017

    Jayanth Mondi, Abhishek Baikadi, Sivakumar Subramanian

  51. Design and Evaluation of Medium Gravity Separator

    Asian Particle Technology Symposium

    31/03/2017

    Arjun P, Sivakumar Subramanian, Raviraju Vysyaraju,

  52. Optimization of selective flocculation through particle size distribution measurements

    National Metallurgists' Day Annual Technical Meeting

    04/09/2017

    Raviraju Vysyaraju, Arjun P, Sivakumar Subramanian,

  53. Computational Fluid Dynamics (CFD) and Experiments Based Design of an Efficient Mixing System

    Asian Particle Technology Symposium

    31/03/2017

    Arjun P, Beena Rai, Sivakumar Subramanian, Tammishetti Venugopal, Raviraju Vysyaraju

  54. CFD Based Performance Comparison of Medium Gravity Closed Spiral Separator and Hydrocyclone Separator

    Thermal and Fluids Engineering Conference

    31/08/2017

    Arjun P, Raviraju Vysyaraju, Sivakumar Subramanian

  55. Design and Evaluation of Novel Spiral separator for beneficiation of Iron ore slime

    International Seminar on Mineral Processing Technology

    09/01/2018

    Raviraju Vysyaraju, Arjun P, Sivakumar Subramanian

  56. Molecular Modelling of Electrolytes for Lithium-Ion Batteries

    Indian Chemical Engineering Congress

    21/09/2017

    Bharath R, Mahesh Mynam, Beena Rai,

  57. Molecular Modelling of Electrolytes for Lithium-Ion Batter

    Indian Chemical Engineering Congress

    30/08/2017

    Bharath R, Beena Rai, Mahesh Mynam

  58. Study of Lithium Ion Battery Electrolytes: Effect of Salt Concentration

    Indian Chemical Engineering Congress

    30/08/2018

    Sravani Repaka, Bharath R, Mahesh Mynam, Beena Rai

  59. The Effects of External Electric Field on the Structural and Transport Properties of Electrolyte for Lithium-Ion Batteries: A Molecular Dynamics Study

    Conference on Materials & Technologies for Energy Conversion and Storage

    01/05/2018

    Bharath R, Mahesh Mynam, Beena Rai

  60. Effect of Temperature and Salt Concentration on Solution Behaviour of Electrolyte in Lithium Ion Battery

    Conference on Materials & Technologies for Energy Conversion and Storage

    01/05/2018

    Mahesh Mynam, Bharath R, Beena Rai

  61. Molecular Modelling of Lithium ion battery electrolytes

    CompFlu

    01/11/2019

    Mahesh Mynam,

  62. Role of Structural Symmetricity of Co-solvents in the Design of Lithium Ion Battery Electrolytes

    International Conference on Advances in Chemical Engineering

    22/11/2019

    SURBHI KUMARI Ashutosh KUMAR, Beena Rai, Mahesh Mynam, Bharath R

  63. Effect of temperature and salt concentration on the properties of electrolyte for sodium ion batteries

    International Conference on Advances in Energy Research

    01/09/2019

    Bharath R, SURBHI KUMARI Ashutosh KUMAR, Mahesh Mynam, Beena Rai

  64. Augmented Total-FETI Algorithm for Computationally Efficient Micromechanical Analysis of a Representative Volume Element

    World Congress on Computational Mechanics

    15/02/2018

    Nagesh Hari Kulkarni, B P Gautham

  65. In-silico design of nanoparticles for transdermal drug delivery application

    Royal Society of Chemistry Nanoscale

    05/02/2018

    Rakesh Gupta, Beena Rai,

  66. Impact of the ceramide subspecies on the nanostructure of stratum corneum lipids using neutron scattering and molecular dynamics simulations

    Indian Chemical Engineering Congress

    14/11/2018

    Kishore Gajula, Rakesh Gupta, Beena Rai,

  67. Development of molecular model of human skin ceramides and its applications in understanding the neutron diffraction experiments

    Indian Chemical Engineering Congress

    15/10/2018

    Beena Rai, Rakesh Gupta, Yogesh Badhe

  68. In Silico Prediction of novel Sweeteners

    Indian Chemical Engineering Congress

    16/10/2018

    Anukrati Goel, Kishore Gajula, Rakesh Gupta, Beena Rai

  69. In Silico Skin Model A Platform for Design and Testing of Nanomaterials

    CompFlu

    05/10/2018

    Rakesh Gupta, Beena Rai,

  70. Effect of surface coverage and chemistry on self-assembly of monolayer protected gold nanoparticles: a molecular dynamics simulation study

    Royal Society of Chemistry Physical Chemistry Chemical Physics Journal

    17/09/2018

    Balarama Sridhar, Rakesh Gupta, Beena Rai

  71. Effect of Chemical Permeation Enhancers on Skin Permeability: In silico screening using Molecular Dynamics simulations

    Scientific Reports

    12/12/2018

    Rakesh Gupta, Balarama Sridhar, Beena Rai,

  72. In-Silico Design of Permeation Enhancers for Topical & Transdermal Drug Delivery Applications

    Gordan Research Conference - Barrier Function of Mammalian skin

    06/06/2019

    Beena Rai, Rakesh Gupta, Balarama Sridhar,

  73. Computer-Aided Design of Nanoparticles for Transdermal Drug Delivery

    Springer

    22/08/2019

    Rakesh Gupta, Beena Rai,

  74. In-Silico Design of Nanoparticles/Permeation Enhancers for Topical and Transdermal Drug Delivery Applications

    Gordan Research Conference - Barrier Function of Mammalian skin15/04/2019

    Rakesh Gupta, Beena Rai,

  75. Dynamic modelling of Li ion battery for SOC estimation

    Indian Chemical Engineering Congress

    16/10/2018

    Naga Neehar Dingari, Beena Rai, Mahesh Mynam,

  76. Rheological model for cosmetic formulation design of polymers

    Indian Chemical Engineering Congress

    16/10/2018

    Hemalatha Jayabal, Beena Rai, Naga Neehar Dingari,

  77. A linear viscoelastic model to understand skin mechanical behavior and for cosmetic formulation design

    International Journal of Cosmetic Science

    24/04/2019

    Hemalatha Jayabal, Naga Neehar Dingari, Beena Rai,

  78. Computation of critical resolved shear stress at various temperatures for Tantalum using Molecular Dynamics simulations

    National Metallurgists' Day Annual Technical Meeting

    01/11/2018

    Shashank Mishra, Beena Rai, Soumyadipta Maiti,

  79. Multiscale analysis of large-strain deformation behaviour of random cross-linked elastomers

    Journal of Molecular Simulation

    16/10/2018

    Beena Rai, Soumyadipta Maiti, Shashank Mishra, Suryanaman Chaube,

  80. Realistic microstructure evolution of complex Ta-Nb-Hf-Zr high-entropy alloys by simulation techniques

    Nature Scientific Reports

    12/10/2019

    Shashank Mishra, Soumyadipta Maiti, Balarama Sridhar, Beena Rai,

  81. Study of Strengthening Effect due to Solid Solution and Short Range Ordering in High Entropy Alloys using Molecular Dynamics Simulations

    World Congress on Integrated Computational Materials Engineering Conference

    28/03/2019

    Soumyadipta Maiti, Shashank Mishra, Beena Rai,

  82. Differential Stabilization of the Metal Ligand Complexes between Organic and Aqueous Phases Drives the Selectivity of Phosphoric Acid Ligands toward Heavier Rare Earth Elements

    Industrial and Engineering Chemistry Research

    19/11/2018

    Sriram Goverapet Srinivasan, Balarama Sridhar, Shally Gupta, Santosh Vasant, Beena Rai

  83. Bulk and Surface DFT investigations of Inorganic Halide Perovskites Screened Using Machine Learning and Materials Property Databases

    Royal Society of Chemistry Physical Chemistry Chemical Physics Journal09/08/2019

    Deepak Shyamsunder Jain, Suryanaman Chaube, Prerna Khullar, Sriram Goverapet Srinivasan, Beena Rai,

  84. Femtosecond laser fabrication of silver nanostructures on glass for surface enhanced Raman spectroscopy

    Nature Scientific Reports

    19/11/2019

    Parama Pal,

  85. Automated surface feature detection using fringe projection: An autoregressive modeling-based approach

    Optics and Lasers in Engineering

    14/05/2019

    Parama Pal, Earu Banoth,

  86. Material Recognition on an Embedded Platform Using Laser Speckle

    IEEE Sensors

    10/08/2019

    Parama Pal, Aishwarya S N, Kartik Muralidharan,

  87. Materials Design in Digital Era: Challenges and Opportunities

    Transactions of Indian Institute of Metals

    06/06/2019

    Deepak Shyamsunder Jain, Rakesh Gupta, Dharmendr Kumar, Shashank Mishra, Bharath R, Mahesh Mynam, Vinay Jain, Sriram Goverapet Srinivasan, Soumyadip Mait, Beena Rai, Balarama Sridhar,

  88. Organelle Specific Intracellular Localization of Bare PDMS Nanoparticles for Drug Delivery Applications

    International Conference on Biomaterial-Based Therapeutic Engineering and Regenerative Medicine

    03/07/2019

    Auhin Kumar Maparu, Beena Rai,

  89. Naturally Bio-Printed Scaffolds for Skin Tissue Engineering Applications

    International Conference on Biomaterial-Based Therapeutic Engineering and Regenerative Medicine

    03/07/2019

    Auhin Kumar Maparu, Beena Rai

  90. A Simple Route for Large-Scale Synthesis of Stable PDMS Nanoparticles

    International Conference on Advances in Polymeric Materials and Human Healthcare

    13/06/2019

    Auhin Kumar Maparu, Beena Rai,

  91. Artificial Skin: An Inspiration from Nature

    International Conference on Advances in Polymeric Materials and Human Healthcare

    13/06/2019

    Auhin Kumar Maparu, Beena Rai,

  92. Silicone Nanoparticles for Drug Delivery Applications

    CompFlu

    22/09/2018

    Auhin Kumar Maparu, Beena Rai,

  93. Synthesis of PDMS Nanoparticles for Drug Delivery Applications

    Nanobioteck

    21/09/2018

    Auhin Kumar Maparu, Beena Rai,

  94. Cytotoxicity and Cellular Uptake Study of Silicone Nanoparticles

    Symposium on Chemical Biology and Drug Discovery

    21/10/2017

    Auhin Kumar Maparu, Beena Rai,

  95. Nanoemulsion based Synthesis of Polymer Nanofibers

    Asian Particle Technology Symposium

    31/03/2017

    Auhin Kumar Maparu, Beena Rai,

  96. Silica-Templated Synthesis of PDMS Nanoparticles for Drug Delivery Applications

    India Nano

    24/11/2017

    Auhin Kumar Maparu, Beena Rai,

  97. Organelle Specific Localization of Ultra-Soft PDMS Nanoparticles for Drug Delivery

    Innovation in Materials Science & Technology

    24/09/2019

    Auhin Kumar Maparu, Beena Rai,

  98. Naturally Bio-Printed Artificial Skin: A Cross-Kingdom Approach

    Innovation in Materials Science & Technology

    24/09/2019

    Auhin Kumar Maparu, Beena Rai

  99. Prediction of ripening duration and shelf life estimation of climacteric fruits using sensing technology, AI ML models and transfer learning

    International Union of Food Science and Technology and World Congress of Food Science and Technology

    17/08/2020

    Jayita Dutta

  100. Metanets- Accelerated discovery and design of photonic metamaterials using deep learning

    Neural Information Processing Systems

    11/12/2020

    P Prajith, Parama Pal, Deepak Jain3, Rinu Chacko, Beena Rai

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