Atanu Saha

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This paper proposes a technique for suppressing low-frequency band noise from speech signal. In practice, speech is often corrupted by color noise like car and multi-talker babble noise that affect mostly the low-frequency region of speech signal. We propose a straightforward approach for noise reduction by utilizing bone conducted (BC) speech. Lower(More)
We isolated and identified Salmonella organisms from ovaries of dead layer birds and from inner content of laid eggs of different poultry farms. The thirty eight ovarian swabs for bacteriology, visceral organs (liver, lung, spleen, egg follicles and intestine) of 38 dead birds for pathological study from 15 layer farms and 45 laid eggs (5 eggs/farm) from(More)
In this paper double quantum well resonant tunneling negative differential resistance (NDR) device based on intrinsic armchair graphene nanoribbon (A-GNR) is proposed. Non-equilibrium Green's function (NEGF) based transport equation was coupled with Poisson's equation to obtain the desired device characteristics. This device shows promising results(More)
This paper presents details of a coupled Schrödinger-Poisson solver for modeling I-V characteristics of graphene nanoribbon field-effect transistors (GNR-FET). Poisson solution is obtained using a three-dimensional finite difference algorithm. The Schrödinger solution is implemented by the scattering matrix method which results in spatially(More)
Touch screen technology, as an user friendly interface for electronics device is going through a revolutionary improvement. Higher implementation cost makes this technology unsuitable for big display screen like multimedia display. The proposed technology in this paper provides touch screen facility to big multimedia display which is highly cost effective(More)
— In this paper, we propose a family of Bayesian estimators for single channel speech enhancement. The Bayesian estimators, which utilize the cost function of the log-spectral amplitude (LSA) estimator, are based on generalized Gamma distribution under speech presence probability. The cost function obtained from the LSA estimator is weighted by(More)
In this paper, we mainly focused on analyzing the thermoelectric property i.e. figure of merit of different nanostructured materials in room temperature (300&#x2013;310 K). Here we studied the transition-metal dichalcogenides, particularly Molybdenum Disulfide (MoS<inf>2</inf>); Metal Oxides, specifically Zinc Oxide (ZnO); and conventional semiconductor(More)
In this paper, we propose a family of Bayesian estimators for single channel speech enhancement. Three different kinds of enhancement estimators are derived from the statistics of bivariate Gamma model. In the Gamma model, it is assumed that the spectral components are correlated with each other. The experimental results show that the proposed estimators(More)
The optical properties of well in well structure formed by armchair graphene nanoribbons (A-GNRs) are studied. A-GNR sheet is modeled by 3rd nearest tight-binding parameter. The optical properties are studied by employing the self-consistent simulation between Non-equilibrium Green's function method and electrostatic Hartree potential distribution. The(More)