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pro vyhledávání: '"Sen, Asok K."'
Using a continuous wavelet transform we have analyzed the cycle-to-cycle variations of pressure in an internal combustion engine. The time series of maximum pressure variations are examined for different loading and their wavelet power spectrum is ca
Externí odkaz:
http://arxiv.org/abs/nlin/0607041
Autor:
Bhattacharya, Somnath, Sen, Asok K.
Publikováno v:
Europhys. Lett., 71 (5), pp. 797-803 (2005)
We consider the dynamics of the charge carriers in a tunneling-enhanced percolation network, named as a Random Resistor cum Tunneling-bond Network (RRTN), where we allow tunneling in the gap between two randomly thrown nearest neighbour metallic bond
Externí odkaz:
http://arxiv.org/abs/cond-mat/0506088
Autor:
Sen, Asok K., Bhattacharya, Somnath
Publikováno v:
"Continuum Models and Discrete Systems," eds. D. Bergman and E. Inan (Kluwer Academic Publishers, Dordrecht, 2004), pp. 367-373
For the low-temperature electrical conductance of a disordered {\it quantum insulator} in $d$-dimensions, Mott \cite{mott} had proposed his Variable Range Hopping (VRH) formula, $G(T) = G_0 {\rm exp}[-(T_0/T)^{\gamma}]$, where $G_0$ is a material con
Externí odkaz:
http://arxiv.org/abs/cond-mat/0506089
Autor:
Sen, Asok K.
Publikováno v:
Indian J. Phys. vol.72A, 363-367 (1998)
We study localization properties of a one-dimensional disordered system characterized by a random non-hermitean hamiltonian where both the randomness and the non-hermiticity arises in the local site-potential; its real part being ordered (fixed), and
Externí odkaz:
http://arxiv.org/abs/cond-mat/9811108
Autor:
Sen, Asok K., Gupta, Abhijit Kar
In a recent paper [Phys. Rev. B{\bf57}, 3375 (1998)], we examined in detail the nonlinear (electrical) dc response of a random resistor cum tunneling bond network ($RRTN$, introduced by us elsewhere to explain nonlinear response of metal-insulator ty
Externí odkaz:
http://arxiv.org/abs/cond-mat/9806282
Autor:
Sen, Asok K.
We study localization properties of a one-dimensional disordered system characterized by a random non-hermitean hamiltonian where both the randomness and the non-hermiticity arises in the local site-potential; its real part being random, and a consta
Externí odkaz:
http://arxiv.org/abs/cond-mat/9710300
Autor:
Sen, Asok K.
Publikováno v:
Mod. Phys. Lett. B, vol.11, pages 555-564, 1997
We study the phase distribution of the complex reflection coefficient in different configurations as a disordered 1D system evolves in length, and its effect on the distribution of the 4-probe resistance $R_4$. The stationary ($L \to \infty$) phase d
Externí odkaz:
http://arxiv.org/abs/cond-mat/9710278
We report in this paper the analytical and numerical results on the effect of amplification on the transmission and reflection coefficient of a periodic one-dimensional Kronig-Penney lattice. A qualitative agreement is found with the tight-binding mo
Externí odkaz:
http://arxiv.org/abs/cond-mat/9710173
Autor:
Gupta, Abhijit Kar, Sen, Asok K.
The DC-response, namely the $I$-$V$ and $G$-$V$ charateristics, of a variety of composite materials are in general found to be nonlinear. We attempt to understand the generic nature of the response charactersistics and study the peculiarities associa
Externí odkaz:
http://arxiv.org/abs/cond-mat/9707125
Autor:
Gupta, Abhijit Kar, Sen, Asok K.
We study dielectric breakdown in a semi-classical bond percolation model for nonlinear composite materials introduced by us and the related breakdown exponent near the percolation threshold in two dimensions. The breakdown exponent after doing finite
Externí odkaz:
http://arxiv.org/abs/cond-mat/9706150