http://nopr.niscair.res.in/handle/123456789/10148 Search the Channel search http://nopr.niscair.res.in/simple-search http://nopr.niscair.res.in/handle/123456789/10160 Title: Use of modern telephone network for time transfer: An innovation <br/> <br/>Authors: Thorat, Pranalee P; Banerjee, P <br/> <br/>Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"> NPL has started a new time service by transmitting digital time data via telephone network in name of Teleclock service. This is quite different from the usual dial-up service in other countries. This unique service can be accessed by the landline telephone as well as by the mobile telephone network. Both types of receivers have been developed by NPL, New Delhi. The concept of this service has been described in this paper. The important features and uniqueness of this system have also been elaborated.</smarttagtype></smarttagtype> <br/> <br/>Page(s): 676-680 Sun, 29 Aug 2010 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/10159 Title: Microwave dielectric relaxation, thermodynamic and conformational studies of hydrogen bonded binary mixtures of propan-1-ol with methyl benzoate and ethyl benzoate <br/> <br/>Authors: Mohan, T Madhu; Sastry, S Sreehari; Murthy, V R K <br/> <br/>Abstract: <smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"><smarttagtype namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"> The dielectric relaxation studies of propan-1-ol with alkyl benzoates (methyl benzoate and ethyl benzoate) have been carried out, for various mole fractions at different temperatures, using LF impedance analyzer, Plunger method and Abbe’s refractometer in radio, microwave and optic frequency regions, respectively. Kirkwood effective correlation factor, corrective Kirkwood correlation factor, Bruggeman parameter, relaxation time and thermo dynamical parameters are calculated using the experimental data. Conformational analysis of the formation of hydrogen bond in the equimolar binary mixture systems of propan-1-ol with alkyl benzoates is supported by experimental and theoretical FT-IR values.</smarttagtype></smarttagtype> <br/> <br/>Page(s): 668-675 Sun, 29 Aug 2010 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/10158 Title: Effect of pressure and temperature on C₆₀ fullerite <br/> <br/>Authors: Sharma, Uma D; Joshi, H; Kumar, M <br/> <br/>Abstract: Simple model has been developed to study the effect of pressure and temperature on C₆₀ solid. Pressure and temperature dependence of volume <i style="">V/V</i>₀, bulk modulus <i style="">B</i>, and coefficient of volume thermal expansion α has been investigated by varying the temperature from room temperature to 2000 K, and pressures from room pressure to 200 kbar. The results have been compared with the available experimental data as well as different theoretical approaches. The good agreement between theory and available experimental data supports the validity of the simple model proposed for C₆₀ solid. <br/> <br/>Page(s): 663-667 Sun, 29 Aug 2010 22:58:59 GMT http://nopr.niscair.res.in/handle/123456789/10157 Title: Structural, thermal and optical properties of Cu²⁺and Co²⁺: PVP polymer films <br/> <br/>Authors: Sivaiah, K; Rudramadevi, B Hemalatha; Buddhudu, S <br/> <br/>Abstract: Spectral characterization of Cu²⁺and Co²⁺: PVP polymer films has been carried out from the measurement of their absorption, excitation and emission spectra in order to understand their optical performance as the visible colour displaying luminescent materials. Transparent and very clear natured reference PVP polymer film has also been developed by employing a solution cast method to measure the profiles of XRD, FTIR and Raman spectra in exploring its structural details. Besides, we have also reported its thermal properties based on the measurement of TG-DTA profiles. <br/> <br/>Page(s): 658-662 Sun, 29 Aug 2010 22:58:59 GMT