sreemoyee roy’s research while affiliated with Indian Institute of Engineering Science and Technology, Shibpur and other places

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Publications (4)


Exploring the self similar properties for monitoring of air quality information
  • Article

February 2015

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23 Reads

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Dipanjan Ghosh

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Sreemoyee Roy

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Abhik Mukherjee

Air quality information has assumed much importance over the years due to the increase in air pollution. One major hindrance in monitoring of air pollutants is the dearth of spatial availability of aerosol concentration measurements due to the cost involved in deployment of sensors. In this respect, self similarity analysis of data can be very useful. This work is based on standard grid based pollutant dispersion models in a simulated environment over different scales of grid size. The fractal dimension is considered as a scale invariant metric which gives an idea about the variation in pollutant concentration across different scales. A method is detailed for measuring the fractal dimension properties. Results indicate that it is possible to apply the dispersion models across different scales and also the air quality monitored in one region can be compared with other regions.



Exploring the dynamics of capped inversion from sodar data

December 2012

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18 Reads

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1 Citation

Fluctuation and Noise Letters

The time evolution of planetary boundary layer can be studied from sodar data. Normally most of the sound wave transmitted above gets backscattered from a single inversion layer. However, during turbulent atmospheric conditions, there are multiple layers from where the signal gets backscattered with varying echo strengths. The present work describes a methodology for computer analysis of multilayered structures. Two distinct backscatter heights are extracted from observed echograms. This noisy measurement is filtered to estimate the layer heights using an a priori system model. The process and measurement noise covariances used by the filter algorithm are tuned from physical considerations to get good filter performance. Data from sodar installed at Maitree station of Antarctica with capping over an inversion layer is used to prove the concept.


Information system analysis for monitoring of air quality in peri-urban Howrah

November 2012

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21 Reads

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3 Citations

Air pollution is growing at an alarming rate across India, with urban regions in particular caught in the toxic web. Although there are stringent acts and regulations for air quality, proper information on air quality is not available round the clock. This work looks at the requirements for the design of a genuine air quality information system. Peri-urban regions of Howrah, with its cluster of foundries and other age-old industries located within densely populated residential zone, is considered as a case study. Air quality data available for this zone is analyzed and compared with that of other Indian cities. The prospects of designing an information system to monitor air quality of this region is explored in the study.

Citations (1)


... Received 19 February 2018; Received in revised form 29 April 2019; Accepted 7 May 2019 construction, waste generation, domestic cooking and heating, and industrial activity grew considerably. Delhi's air pollution is a combination of factors, including industries, power plants, domestic combustion of coal and biomass, and transport (direct vehicle exhaust and indirect road dust) that contribute to air pollution (Roy and Mukherjee, 2012). For further planning to improve the quality of air, it is important to know the change in air quality over Delhi after the implementation of various schemes of switching over to CNG (Compressed Natural Gas) and improvements in fuel quality and vehicle technology etc (Narain and Krupnick 2007). ...

Reference:

Long-term trend of ventilation coefficient over Delhi and its potential impacts on air quality
Information system analysis for monitoring of air quality in peri-urban Howrah
  • Citing Conference Paper
  • November 2012