Dr. Ratnesh Kumar Profile

Dr. Ratnesh Kumar

Professor at Iowa State Univ of Science and Technology

SPIE Involvement:

Author

Area of Expertise:

Cyberphysical systems , Model-based Software verification and Testing , Embedded Software , Sensors and Networks , Web Services , Power Systems

Websites:

Personal Website

Publications (8)

Proceedings Article | 18 September 2018 Presentation + Paper

Tunable mid-infrared optical resonator on nanopatterned chalcogenide glasses

Shawana Tabassum, Liang Dong, Ratnesh Kumar

Proceedings Volume 10766, 107660F (2018) https://doi.org/10.1117/12.2326680

KEYWORDS: Nanostructures, Mid-IR, Absorption, Annealing, Silicon, Chalcogenide glass, Optical resonators, Sensors, Image processing, Glasses

Read Abstract +

Proceedings Article | 4 September 2018 Presentation + Paper

Heater integrated nanopatterned optical fiber-tip to realize a reusable gas sensor

Shawana Tabassum, Liang Dong, Ratnesh Kumar

Proceedings Volume 10755, 107550G (2018) https://doi.org/10.1117/12.2319440

KEYWORDS: Sensors, Fiber optics sensors, Nanostructures, Optical fibers, Molecules, Metals, Gas sensors, Coating, Nitrogen, Graphene

Read Abstract +

Proceedings Article | 20 July 2018 Paper

Dynamic variations in optical properties of graphene oxide in response to gas exposure as determined from thin-film interference

Shawana Tabassum, Liang Dong, Ratnesh Kumar

Proceedings Volume 10654, 106541J (2018) https://doi.org/10.1117/12.2305999

KEYWORDS: Graphene, Oxides, Optical properties, Refractive index, Thin films, Ellipsometry, Gases, Sensing systems

Read Abstract +

Proceedings Article | 15 May 2018 Presentation + Paper

Modeling and analysis of energy extraction circuits for triboelectric nanogenerator based vibrational energy harvesting

Madhav Pathak, Ratnesh Kumar

Proceedings Volume 10663, 106630F (2018) https://doi.org/10.1117/12.2305786

KEYWORDS: Switches, Capacitors, Device simulation, Transducers, Capacitance, Energy transfer, Energy harvesting, Switching, Dielectrics, Analytical research

Read Abstract +

Proceedings Article | 14 May 2018 Presentation + Paper

Salicylic acid (SA) detection using bi-enzyme microfluidic electrochemical sensor

Bhuwan Kashyap, Ratnesh Kumar

Proceedings Volume 10662, 106620K (2018) https://doi.org/10.1117/12.2305124

KEYWORDS: Sensors, Electrodes, Microfluidics, Gold, Agriculture, Coating

Read Abstract +

Proceedings Article | 3 May 2018 Paper

1.5mm precision liquid level measurement using impedance spectroscopy

Bhuwan Kashyap, Charles Sestok, Anand Dabak, Srinath Ramaswamy, Ratnesh Kumar

Proceedings Volume 10643, 106430Y (2018) https://doi.org/10.1117/12.2305014

KEYWORDS: Sensors, Liquids, Capacitance, Calibration, Electronics, Dielectric spectroscopy, Error analysis, Performance modeling, Precision measurement, Dielectrics

Read Abstract +