Ms. Nirmala Devi Profile

Nirmala Devi

at CSIR-CEERI

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Author

Publications (9)

Proceedings Article | 2 March 2020 Paper

Rapid nondestructive evaluation of defects in GFRP composites using terahertz line scanner

A. Mercy Latha, Supriyanka Rayapureddy, Nirmala Devi, Prabhu Rajagopal, Krishnan Balasubramaniam, Bala Pesala

Proceedings Volume 11279, 1127917 (2020) https://doi.org/10.1117/12.2545922

KEYWORDS: Terahertz radiation, Scanners, Deconvolution, Sensors, Nondestructive evaluation, Imaging systems, Point spread functions, Composites, Image filtering, Gaussian filters

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Proceedings Article | 2 March 2020 Paper

Hydration studies of nanosilica incorporated cement using mid-infrared and terahertz spectroscopy

Shaumik Ray, Jyotirmayee Dash, Nirmala Devi, Saptarshi Sasmal, Bala Pesala

Proceedings Volume 11279, 112791S (2020) https://doi.org/10.1117/12.2545862

KEYWORDS: Cements, Spectroscopy, Mid-IR, Terahertz spectroscopy, Infrared spectroscopy

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Proceedings Article | 1 March 2019 Presentation + Paper

Tracking the hydration dynamics of Nafion fuel cell membranes using terahertz spectroscopy

Nirmala Devi, Shaumik Ray, Avanish Shukla, Santoshkumar Bhat, Bala Pesala

Proceedings Volume 10917, 109171R (2019) https://doi.org/10.1117/12.2511029

KEYWORDS: Terahertz radiation, Terahertz spectroscopy

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Proceedings Article | 1 March 2019 Presentation + Paper

Rapid terahertz imaging for non-destructive evaluation applications using Schottky receivers and spatial adaptive sampling

Harikrishnan Kaimal, Nirmala Devi, Prabhu Rajagopal, Krishnan Balasubramaniam, Bala Pesala

Proceedings Volume 10917, 1091712 (2019) https://doi.org/10.1117/12.2511010

KEYWORDS: Terahertz radiation, Nondestructive evaluation, Composites, Continuous wave operation, Imaging systems, Fiber reinforced polymers, Image acquisition, Millimeter wave imaging

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Proceedings Article | 23 February 2018 Presentation + Paper

Non-destructive evaluation of GFRP-wood sandwich structure composite using terahertz imaging

Harikrishnan Kaimal, Nirmala Devi, Shaumik Ray, Prabhu Rajagopal, Krishnan Balasubramanian, Bala Pesala

Proceedings Volume 10531, 105310D (2018) https://doi.org/10.1117/12.2289718

KEYWORDS: Terahertz radiation, Composites, Nondestructive evaluation, Imaging systems, Continuous wave operation, Absorption

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Proceedings Article | 23 February 2018 Paper

Understanding the effect of nanosilica incorporation on dicalcium silicate hydration using terahertz spectroscopy

Shaumik Ray, Jyotirmayee Dash, Nirmala Devi, Saptarshi Sasmal, Bala Pesala

Proceedings Volume 10531, 105311G (2018) https://doi.org/10.1117/12.2289672

KEYWORDS: Spectroscopy, Terahertz radiation, Silicates, Terahertz spectroscopy, Infrared spectroscopy

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Proceedings Article | 25 February 2016 Paper

Enhancement of water retention in UV-exposed fuel-cell proton exchange membranes studied using terahertz spectroscopy

Shaumik Ray, Nirmala Devi, Jyotirmayee Dash, Gutru Rambabu, Santoshkumar Bhat, Bala Pesala

Proceedings Volume 9747, 97470P (2016) https://doi.org/10.1117/12.2212388

KEYWORDS: Terahertz radiation, Terahertz spectroscopy, Ultraviolet radiation, Spectroscopy, Polymers, Zirconium dioxide, Titanium, Silica, Absorption, Carbon nanotubes, Composites, Lamps, Electrons

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Proceedings Article | 25 February 2016 Paper

Thickness measurement of tablet coating using continuous-wave terahertz reflection spectroscopy

Nirmala Devi, Jyotirmayee Dash, Shaumik Ray, Bala Pesala

Proceedings Volume 9747, 974709 (2016) https://doi.org/10.1117/12.2212366

KEYWORDS: Terahertz radiation, Coating, Tablets, Reflection, Reflectance spectroscopy, Spectroscopy, Continuous wave operation, Terahertz spectroscopy, Acquisition tracking and pointing, Optical microscopes, Interfaces, Refractive index

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Proceedings Article | 14 March 2015 Paper

Hydration kinetics of cement composites with varying water-cement ratio using terahertz spectroscopy

Shaumik Ray, Jyotirmayee Dash, Nirmala Devi, Saptarshi Sasmal, Bala Pesala

Proceedings Volume 9362, 936211 (2015) https://doi.org/10.1117/12.2079127

KEYWORDS: Cements, Terahertz radiation, Spectroscopy, Silicates, Terahertz spectroscopy, Composites, Calcium, Silica, Statistical analysis, Solids

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Showing 5 of 9 publications

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