47 citations · 210 across the 18 of their papers we have counts for
18 papers
Interplay of transitions between oscillations with emergence of fireballs and quantification of phase coherence, scaling index in a magnetized glow discharge plasma of toroidal assembly
Debajyoti Saha, Sabuj Ghosh, Pankaj Kumar Shaw +2
Interplay of transition of floating potential fluctuations in a glow discharge plasma in the toroidal vacuum vessel of SINP tokamak has been observed. With variation in the strengt…
Quantification of scaling exponent with crossover type phenomena for different types of forcing in DC glow discharge plasma
Debajyoti Saha, Pankaj Kumar Shaw, Sabuj Ghosh +2
We have carried out a detailed study of scaling region using detrended fractal analysis test by applying different forcing likewise noise, sinusoidal, square on the floating potent…
Self-organised-criticality and punctuated equilibrium in bouncing balls
Kaushal Gianchandani, A. N. Sekar Iyengar, Prasanta K. Panigrahi
A nonlinearly coupled system of bouncing balls is shown to exhibit features like self-organised-criticality (SOC) and punctuated equilibrium (PE) in suitable parameter domains. The…
Intrinsic Noise Induced Coherence Resonance in a Glow discharge Plasma
Pankaj Kumar Shaw, D. Saha, S. Ghosh +2
Experimental evidence of intrinsic noise induced coherence resonance in a glow discharge plasma is being reported. Initially the system is started at a discharge voltage (DV) where…
Investigation of stochastic resonance (SR) near homoclinic bifurcation in a unijunction transistor (UJT) relaxation oscillator
Souvik Bose, M. S. Janaki, Sandip Sarkar +1
A P-spice simulation followed by an experiment with a unijunction transistor (UJT) has been carried out to investigate stochastic resonance (SR) in which the response of a nonlinea…
Canard-induced mixed mode oscillations in an excitable glow discharge plasmas
M. Nurujjaman, A. N. Sekar Iyengar
We demonstrated experimentally canard induced mixed mode oscillations (MMO) in an excitable glow discharge plasma, and the results are validated through numerical solution of the F…
Multi-scale dynamics of glow discharge plasma through wavelets: Self-similar behavior to neutral turbulence and dissipation
Bapun K. Giri, Chiranjit Mitra, Prasanta K. Panigrahi +1
The multiscale dynamics of glow discharge plasma is analysed through wavelet transform, whose scale dependent variable window size aptly captures both transients and non-stationary…
Differential Entropy Dynamics: A Possible Cause of Coherence Resonance
Juhi Rajhans, A. N. Sekar Iyengar
Coherence resonance can be explained using differential entropy and mutual information. This theory explores the role of external noise in stabilising chaotic circuits such as the…
Non-stationary Dynamics in the Bouncing Ball: A Wavelet perspective
Abhinna Kumar Behera, Prasanta K. Panigrahi, A. N. Sekar Iyengar
The non-stationary dynamics of a bouncing ball, comprising of both periodic as well as chaotic behavior, is studied through wavelet transform. The multi-scale characterization of t…
Effect of a sub and supra-threshold periodic forcing an excitable glow discharge plasma near its bifurcation point
Md. Nurujjaman, A. N. Sekar Iyengar
In this paper non-linear dynamics of a periodically forced excitable glow discharge plasma has been studied. The experiments were performed in glow discharge plasma where excitabil…
Wavelet Based Volatility Clustering Estimation of Foreign Exchange Rates
A. N. Sekar Iyengar
We have presented a novel technique of detecting intermittencies in a financial time series of the foreign exchange rate data of U.S.- Euro dollar(US/EUR) using a combination of bo…
Emergence of the stochastic resonance in glow discharge plasma
Md Nurujjaman, A N Sekar Iyengar, P Parmananda
stochastic resonance, glow discharge plasma, excitable medium, absolute mean difference
Coherence resonance in an unijunction transistor relaxation oscillator
Md. Nurujjaman, P. S. Bhattacharya, A. N. Sekar Iyengar +1
The phenomenon of coherence resonance (CR) is investigated in an unijunction transistor relaxation oscillator (UJT-RO) and quantified by estimating the normal variance (NV). Depend…
Continuous wavelet transform based time-scale and multi-fractal analysis of the nonlinear oscillations in a hollow cathode glow discharge plasma
Md. Nurujjaman, Ramesh Narayanan, A. N. Sekar Iyengar
Continuous wavelet transform (CWT) based time-scale and multi-fractal analyses have been carried out on the anode glow related nonlinear floating potential fluctuations in a hollow…
Noise invoked resonances near a homoclinic bifurcation in the glow discharge plasma
Md. Nurujjaman, A. N. Sekar Iyengar, Punit Parmananda
Stochastic Resonance (SR) and Coherence Resonance (CR) have been studied experimentally in the discharge plasma close to a homoclinic bifurcation. For the SR phenomena, it is obser…
Chaotic to ordered state transition of cathode-sheath instabilities in DC glow discharge plasmas
Md. Nurujjaman, A. N. Sekar Iyengar
Transition from chaotic to ordered state has been observed during the initial stage of a discharge in a cylindrical dc glow discharge plasma. Initially it shows a chaotic behavior…
Realization of SOC behavior in a dc glow discharge plasma
Md. Nurujjaman, A. N. Sekar Iyengar
Experimental observations consistent with Self Organized Criticality (SOC) have been obtained in the electrostatic floating potential fluctuations of a dc glow discharge plasma. Po…
Parametric investigation of nonlinear fluctuations in a dc glow discharge plasma
Md. Nurujjaman, Ramesh Narayanan, A. N. Sekar Iyengar
Glow discharge plasmas exhibit various types of self excited oscillations for different initial conditions like discharge voltages and filling pressures. The behavior of such oscil…