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- Sanghamitra Ghosal, Bhaswati Goswami, Ratna Ghosh, Paramita Banerjee
- 2011 Second International Conference on Emerging…
- 2011

A new method is being proposed in this paper to ascertain the stability of the dental implant after its placement in situ. One of the established methods of doing this is by monitoring the change of resonance frequency of the system with time which is typically referred to as Resonance Frequency Analysis [1]. Traditionally, the resonance frequency is… (More)

- Suman Saha, Saptarshi Das, +5 authors Amitava Gupta
- ISA transactions
- 2010

The phase curve of an open loop system is flat in nature if the derivative of its phase with respect to frequency is zero. With a flat-phase curve, the corresponding closed loop system exhibits an iso-damped property i.e. maintains constant overshoot with the change of gain. This implies enhanced parametric robustness e.g. to variation in system gain. In… (More)

- Suman Saha, Saptarshi Das, +5 authors Amitava Gupta
- ArXiv
- 2012

Phase shaping using fractional order (FO) phase shapers has been proposed by many contemporary researchers as a means of producing systems with iso-damped closed loop response due to a stepped variation in input. Such systems, with the closed loop damping remaining invariant to gain changes can be used to produce dead-beat step response with only rise time… (More)

- Suman Saha, Saptarshi Das, +5 authors Shantanu Das
- ArXiv
- 2009

Phase curve of an open loop system is flat in nature if the derivative of phase with respect to frequency is zero. With a flat phase curve, the corresponding closed-loop system exhibits an iso-damped property i.e. maintains constant overshoot with the change of gain and with other parametric variations. In recent past application, fractional order (FO)… (More)

Modern day process control uses digital controllers which are based on the principle of distributed rather than centralized control. Distributing controllers, sensors and actuators across a plant entails considerable wiring which can be reduced substantially by integrating the components of a control loop over a network. The other advantages include greater… (More)

- RATNA GHOSH, RESHMA XALXO, MANIK GHOSH
- 2013

Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES) was used to estimate and evaluate the levels of heavy metals in vegetables collected from various sites of Ranchi city (tribal dominated population) followed by health risk assessment by determining Metal Pollution Index (MPI), Daily intake of metal (DIM) and Health Risk Index (HRI). The… (More)

- Manika Saha, Ratna Ghosh, Bhaswati Goswami
- IEEE Trans. Instrumentation and Measurement
- 2014

In this paper, a robustness metric and a sensitivity metric have been defined, which can be used to determine a suitable combination of the filter tuning parameters of the extended Kalman filter. These metrics are related to the innovation covariance and their derivation necessitates a change of paradigm from the estimated states to the estimated… (More)

- M Das, A Banerjee, +4 authors A Gupta
- ISA transactions
- 2007

Multivariable process control forms an important part of modern day control. While hardwired controllers still constitute the basic component of such control systems, with reducing communication latencies, controllers on the network are being mooted as a viable alternative. These controllers promise a large number of advantages in terms of reduction in… (More)

- Debasish Chowdhury, Bhaswati Goswami, Ratna Ghosh
- 2014 Fourth International Conference of Emerging…
- 2014

A low cost instrumentation system was proposed in this paper to determine the stability of dental implants using Resonance Frequency Analysis (RFA) technique. In the present work, an improved system has been described which provides a microcontroller based tracking of the change in resonance frequency (RF) when the dental implant is dipped in a hardening… (More)

- Stephen So, Aidan E. W. George, Ratna Ghosh, Kuldip K. Paliwal
- CSSP
- 2017

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