NISCAIR Online Periodicals Repository Collection: IJPAP Vol.49(03) [March 2011]
http://nopr.niscair.res.in/handle/123456789/11110
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Current-mode universal biquadratic filter with five inputs and one output using three ICCIIs
http://nopr.niscair.res.in/handle/123456789/11155
Title: Current-mode universal biquadratic filter with five inputs and one output using three ICCIIs
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<br/>Authors: Horng, Jiun-Wei
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<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>
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<br/>Page(s): 214-217Dielectric relaxation spectroscopy and ion conduction in poly(ethylene oxide)-blend salts-montmorillonite nanocomposite electrolytes
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
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<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.
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<br/>Page(s): 204-213Non-equilibrium statistical thermodynamics perturbation theory: A new approach to Maxwell molecules
http://nopr.niscair.res.in/handle/123456789/11153
Title: Non-equilibrium statistical thermodynamics perturbation theory: A new approach to Maxwell molecules
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<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.
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<br/>Page(s): 199-203Thermal expansivity at high temperatures for ionic solids
http://nopr.niscair.res.in/handle/123456789/11152
Title: Thermal expansivity at high temperatures for ionic solids
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<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.
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<br/>Page(s): 195-198