http://nopr.niscair.res.in/handle/123456789/11110 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/11155 Title: Current-mode universal biquadratic filter with five inputs and one output using three ICCIIs <br/> <br/>Authors: Horng, Jiun-Wei <br/> <br/>Abstract: A current-mode universal biquadratic filter with five inputs and one output employing three inverting second-generation current conveyors (ICCIIs), two grounded capacitors and two resistors is presented. The new circuit offers the following advantage features: very low active and passive sensitivities, using of grounded capacitors that is ideal for integrated circuit implementation, the versatility to synthesize any type of active filter transfer functions without requirements for critical component matching conditions, very high output impedance and needs not another current follower to duplicate the input current signal for the realization of notch or allpass responses.<b style=""></b> <br/> <br/>Page(s): 214-217 Sat, 26 Feb 2011 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/11154 Title: Dielectric relaxation spectroscopy and ion conduction in poly(ethylene oxide)-blend salts-montmorillonite nanocomposite electrolytes <br/> <br/>Authors: Choudhary, Shobhna; Sengwa, R J <br/> <br/>Abstract: Poly(ethylene oxide) (PEO) and blend alkaline metal salts (equal number of cations of lithium perchlorate trihydrate and sodium perchlorate monohydrate) complexations with montmorillonite (MMT) nanoclay filler up to 20 wt% concentration were synthesized by direct melt compounded hot-press technique at temperature 104°C under 3 tons pressure. The spectra of complex dielectric function, electric modulus, and alternating current (<i style="">ac</i>) electrical conductivity and complex impedance plane plots of these polymer nanocomposite electrolytes were investigated in the frequency range 20 Hz - 1 MHz at ambient temperature. Relaxation times corresponding to electrode polarization and ionic conduction relaxation processes, and their correlation with <i style="">dc</i> ionic conductivity were explored. It has been recognized that the increase of MMT concentration results in stiffening of the PEO–MMT transient cross-linked structures, which decreases the PEO chain segmental dynamics and the cations translational motion. <br/> <br/>Page(s): 204-213 Sat, 26 Feb 2011 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/11153 Title: Non-equilibrium statistical thermodynamics perturbation theory: A new approach to Maxwell molecules <br/> <br/>Authors: Emampour, S J Shakhs; Haghighi, Behzad; Maleki, Hamed <br/> <br/>Abstract: A new non-equilibrium statistical thermodynamics perturbation theory was developed which could be applied in parallel to equilibrium statistical thermodynamics perturbation theory. The present method is based on the reminiscent of Boltzmann H-theorem. The concept of the non-equilibrium statistical thermodynamics perturbation theory formalism to the non-equilibrium ensembles method has been embodied and utilized. The acquired equation can be used for molecules in fluid state to estimate the non-equilibrium internal energy in terms of non-equilibrium internal energy of the reference fluid. With grossly simplifying methodology, a closed-form equation has been deduced for the Maxwell molecules as the reference fluid for which the used pair interaction potential is proportional to the inverse power of the fourth order of separation distance. <br/> <br/>Page(s): 199-203 Sat, 26 Feb 2011 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/11152 Title: Thermal expansivity at high temperatures for ionic solids <br/> <br/>Authors: Srivastava, S K; Sinha, Pallavi <br/> <br/>Abstract: New expression for temperature dependence of thermal expansivity has been derived in high temperature region. Newly developed relationship is based on the linear relationship between thermal expansivity and isothermal bulk modulus at temperatures higher than the Debye temperature. Developed expression is used to estimate the temperature dependence of thermal expansivity and volume expansion ratio for ionic solids viz. NaCl, KCl, MgO and CaO. An agreement between theory and experiment reveals the validity of the present approach. <br/> <br/>Page(s): 195-198 Sat, 26 Feb 2011 22:58:59 GMT