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Search Results: 1 - 10 of 144650 matches for " B. Bagchi "
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Relationship between Working Capital Management and Profitability: A Study of Selected FMCG Companies in India
B Bagchi
Business and Economics Journal , 2012,
Abstract: The purpose of this paper is to investigate the relationship between working capital management and firm profitability and to identify the variables that most affect profitability. Working capital management is considered to be a vital issue in financial management decision and it has its effect on liquidity as well as on profitability of the firm. Moreover, an optimal working capital management positively contributes in creating firm value. In this study, we have selected a sample of 10 FMCG (Fast Moving Consumer Goods) companies in India from CMIE database covering a period of 10 years from 2000–01 to 2009–10. Profitability has been measured in terms of return on assets (ROA).Cash conversion cycle (CCC), interest coverage ratio, age of inventory, age of creditors, age of debtors and debt-equity ratio have been used as explanatory variables. Pearson’s correlation and pooled ordinary least squares regression analysis are used in the study. The study results confirm that there is a strong negative relationship between variables of the working capital management and profitability of the firm. As the CCC increases,profitability of the firm decreases, and managers can create a positive value for the shareholders by reducing the CCC to a possible minimum level. There is also a stumpy negative relationship between debt used by the firm and its profitability.
Position-dependent mass models and their nonlinear characterization
B. Bagchi
Physics , 2007, DOI: 10.1088/1751-8113/40/49/F01
Abstract: We consider the specific models of Zhu-Kroemer and BenDaniel-Duke in a sech$^{2}$-mass background and point out interesting correspondences with the stationary 1-soliton and 2-soliton solutions of the KdV equation in a supersymmetric framework.
An update on PT-symmetric complexified Scarf II potential, spectral singularities and some remarks on the rationally-extended supersymmetric partners
B. Bagchi,C. Quesne
Physics , 2010, DOI: 10.1088/1751-8113/43/30/305301
Abstract: The $\cal PT$-symmetric complexified Scarf II potential $V(x)= - V_1 \sech^{2}x + {\rm i} V_2 \sech x \tanh x$, $V_1>0$ , $V_{2}\neq 0$ is revisited to study the interplay among its coupling parameters. The existence of an isolated real and positive energy level that has been recently identified as a spectral singularity or zero-width resonance is here demonstrated through the behaviour of the corresponding wavefunctions and some property of the associated pseudo-norms is pointed out. We also construct four different rationally-extended supersymmetric partners to $V(x)$, which are $\cal PT$-symmetric or complex non-$\cal PT$-symmetric according to the coupling parameters range. A detailed study of one of these partners reveals that SUSY preserves the $V(x)$ spectral singularity existence.
A unified treatment of exactly solvable and quasi-exactly solvable quantum potentials
B. Bagchi,A. Ganguly
Physics , 2003, DOI: 10.1088/0305-4470/36/11/101
Abstract: By exploiting the hidden algebraic structure of the Schrodinger Hamiltonian, namely the sl(2), we propose a unified approach of generating both exactly solvable and quasi-exactly solvable quantum potentials. We obtain, in this way, two new classes of quasi-exactly solvable systems one of which is of periodic type while the other hyperbolic.
Zero-energy states for a class of quasi-exactly solvable rational potentials
B. Bagchi,C. Quesne
Physics , 1997, DOI: 10.1016/S0375-9601(97)00213-2
Abstract: Quasi-exactly solvable rational potentials with known zero-energy solutions of the Schro\" odinger equation are constructed by starting from exactly solvable potentials for which the Schr\" odinger equation admits an so(2,1) potential algebra. For some of them, the zero-energy wave function is shown to be normalizable and to describe a bound state.
sl(2, C) as a complex Lie algebra and the associated non-Hermitian Hamiltonians with real eigenvalues
B. Bagchi,C. Quesne
Physics , 2000, DOI: 10.1016/S0375-9601(00)00512-0
Abstract: The powerful group theoretical formalism of potential algebras is extended to non-Hermitian Hamiltonians with real eigenvalues by complexifying so(2,1), thereby getting the complex algebra sl(2,\C) or $A_1$. This leads to new types of both PT-symmetric and non-PT-symmetric Hamiltonians.
Comment on `Supersymmetry, PT-symmetry and spectral bifurcation'
B. Bagchi,C. Quesne
Physics , 2010, DOI: 10.1016/j.aop.2010.10.007
Abstract: We demonstrate that the recent paper by Abhinav and Panigrahi entitled `Supersymmetry, PT-symmetry and spectral bifurcation' [Ann.\ Phys.\ 325 (2010) 1198], which considers two different types of superpotentials for the PT-symmetric complexified Scarf II potential, fails to take into account the invariance under the exchange of its coupling parameters. As a result, they miss the important point that for unbroken PT-symmetry this potential indeed has two series of real energy eigenvalues, to which one can associate two different superpotentials. This fact was first pointed out by the present authors during the study of complex potentials having a complex $sl(2)$ potential algebra.
Creation and annihilation operators and coherent states for the PT-symmetric oscillator
B. Bagchi,C. Quesne
Physics , 2001, DOI: 10.1142/S0217732301005916
Abstract: We construct two commuting sets of creation and annihilation operators for the PT-symmetric oscillator. We then build coherent states of the latter as eigenstates of such annihilation operators by employing a modified version of the normalization integral that is relevant to PT-symmetric systems. We show that the coherent states are normalizable only in the range (0, 1) of the underlying coupling parameter $\alpha$.
Conditionally exactly solvable potential and dual transformation in quantum mechanics
B. Bagchi,C. Quesne
Physics , 2004, DOI: 10.1088/0305-4470/37/12/L02
Abstract: We comment that the conditionally exactly solvable potential of Dutt et al. and the exactly solvable potential from which it is derived form a dual system.
A new PT symmetric complex Hamiltonian with a real spectra
B. Bagchi,R. Roychoudhury
Physics , 1999, DOI: 10.1088/0305-4470/33/1/101
Abstract: We construct an isospectrum systems in terms of a real and complex potential to show that the underlying PT symmetric Hamiltonian possesses a real spectrum which is shared by its real partner.
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