http://nopr.niscair.res.in/handle/123456789/8223 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/8346 Title: Novel single resistance controlled sinusoidal oscillator using FTFN and OTA <br/> <br/>Authors: Kumar, V Kumar; Pal, K; Gupta, G K <br/> <br/>Abstract: A novel single resistance controlled sinusoidal oscillator using one <i style="">p</i> Four terminal floating nullor (<i style="">p</i>FTFN) and one Operational transconductance amplifier (OTA) to alongside two resistors and two capacitors, all ground, is presented. It is suitable for IC implementation due to use of grounded capacitors. Simulations results are given to verify the theoretical analysis. The oscillation frequency is adjustable through grounded resistor R₁ which can be made voltage variable. <br/> <br/>Page(s): 625-627 http://nopr.niscair.res.in/handle/123456789/8345 Title: Microwave absorption and relaxation studies of binary mixtures of fluoro substituted anilines with some primary alcohols in benzene solutions <br/> <br/>Authors: Prajapati, A N; Rana, V A; Vyas, A D <br/> <br/>Abstract: Complex permittivity at 9.1 GHz, static permittivity at 455 kHz and refractive index at optical frequency of methanol, ethanol, 1-propanol, 2-fluoroaniline, 4-fluoroaniline and their binary mixtures have been measured at a single temperature (30°C) in dilute solution of non-polar solvent benzene. The measured values of permittivity and dielectric loss have been used to evaluate distribution parameter (<img src='/image/spc_char/alpha.gif' border=0>) and relaxation times <img src='/image/spc_char/tow.gif' border=0> ₀, <img src='/image/spc_char/tow.gif' border=0> _(1), <img src='/image/spc_char/tow.gif' border=0> ₍₂₎and dipole moment(<img src='/image/spc_char/micro.gif' border=0> ). The variation of relaxation time versus concentration suggests solute-solute/solute-solvent type of association through hydrogen bonding. <br/> <br/>Page(s): 620-624 http://nopr.niscair.res.in/handle/123456789/8344 Title: Surface phenomenon of chemisorption and its effect on density of states with reference to correlation on the metal surface <br/> <br/>Authors: Patra, S <br/> <br/>Abstract: A change in density of states is obtained by inclusion of intra-atomic interaction term to the mixing Hamiltonian constructed due to chemisorbed adatoms  with the clean  metal surface. The double-time Green function technique was employed in the Zubarev’s  equation of motion formalism and in order to decouple the hierarchy of higher order Green functions Hartee-Fock decoupling  approximation was assumed. From the corresponding surface Green function, the modified density of states was obtained through which chemisorption energy and energy of localization were estimated and it was  found that they were of the same order as per the prediction <br/> <br/>Page(s): 616-619 http://nopr.niscair.res.in/handle/123456789/8343 Title: Thermodynamic properties of repulsive hard-core Yukawa fluid <br/> <br/>Authors: Srivastava, Rajat; Dwivedee, Dhermendra Kumar; Khanna, K N <br/> <br/>Abstract: A simple analytical expression of the mean spherical solution (Mean spherical approximation – high temperature expansion) to the Ornstien-Zernike equation for repulsive hard core Yukawa fluid is examined. The thermodynamic and structural properties of purely repulsive hard-core Yukawa particles in the fluid state are determined by employing this model and compared with simulation data. The results show that the present model illustrates the remarkable improvement of internal energy per particle over existing theoretical values. <br/> <br/>Page(s): 612-615