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Bhubaneshwar, India

Rout G.C.,iversity | Panda S.,Trident Academy of Technology
Solid State Communications | Year: 2010

The spectral density function of neutron scattering is directly proportional to the imaginary part of the dynamic magnetic spin susceptibility. An attempt is made in the present communication to calculate the longitudinal spin susceptibility for the colossal magneto-resistive manganites to observe the resonance peaks at the magnetic and CDW interaction energies. The model Hamiltonian consists of s-d type exchange interaction between the spins of itinerant eg and core t2 g electrons and Heisenberg type t2 g core electron spin interactions. In addition, there exists a CDW interaction in the eg band due to charge disproportion in Mn3 + and Mn4 + ions. The magnetic susceptibility is evaluated by using equations of motion of Zubarev's technique for a two particle Green's function. The effect of CDW interaction on dynamic spin susceptibility is investigated. © 2009 Elsevier Ltd. All rights reserved.

Tripathy A.K.,Trident Academy of Technology
International Journal of Computing Science and Mathematics | Year: 2014

In this paper, a new class of generalised (Φ, ρ)-univex function is introduced. Three approaches for both primal and mixed type dual of a non-differentiable multi-objective fractional programming problems are presented. Also, the necessary and sufficient conditions of efficient solution for fractional programming are established. Weak and strong duality theorems are established under generalised (Φ, ρ)-univexity assumption. Copyright © 2014 Inderscience Enterprises Ltd.

Pal P.R.,National Institute of Technology Raipur | Panda R.,Trident Academy of Technology
TechSym 2010 - Proceedings of the 2010 IEEE Students' Technology Symposium | Year: 2010

Feature extraction and classification of biosignals is an important issue in development of disease diagnostic expert system (DDES). In this paper we propose a simple method for EEG classification based on Fourier features. Parameters like energy, entropy, power, and kurtosis were considered for discrimination of various categories of EEG signals. After calculating the above mentioned parameters of the discussed signals, we found that without going for rigorous time-frequency domain analysis, only frequency based analysis is well suitable to classify various EEG signals. © 2010 IEEE.

Sahoo S.,National Institute of Technology Durgapur | Das C.K.,Trident Academy of Technology | Maharana L.,Orissa Engineering College, Bhubaneswar
Physics of Atomic Nuclei | Year: 2011

We study the effect of Z′-mediated flavor-changing neutral current on the B → ππ decays. The branching ratios of these decays can be enhanced remarkably in the nonuniversal Z′ model. Our estimated branching ratios B(B0 → π0π0) are enhanced significantly from their standard model (SM) value. For g′/g = 1, the branching ratios B(B0 → π0π0) are very close to the recently observed experimental values and for higher values of g′/g branching ratios are more. Our calculated branching ratios B(B0 → π+π-) and B(B+ → π+π0) are also enhanced from the SM value as well as the recently observed experimental values. These enhancements of branching ratios from their SM value give the possibility of new physics. © 2011 Pleiades Publishing, Ltd.

Sahoo S.,National Institute of Technology Durgapur | Das C.K.,Trident Academy of Technology | Maharana L.,Orissa Engineering College, Bhubaneswar
International Journal of Modern Physics A | Year: 2011

B0 qmixing offers a profound probe into the effects of new physics beyond the Standard Model. In this paper, Bs ooverlineBs 0}and Bd 0overlineBd 0}mass differences are considered taking the effect of both Z-and Z′-mediated flavor-changing neutral currents in the B0 qB0 qmixing (q = d, s). Our estimated mass of Z′ boson is accessible at the experiments LHC and B-factories in near future. © 2011 World Scientific Publishing Company.

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