http://nopr.niscpr.res.in/handle/123456789/7208 2026-10-09T09:01:18Z 2026-10-09T09:01:18Z Puri, R K Puri, Vijaya http://nopr.niscpr.res.in/handle/123456789/7595 2010-03-09T16:30:42Z 2006-12-01T00:00:00Z

Title: Response of thin film Al₂O₃ optical waveguide to moisture in paper Authors: Puri, R K; Puri, Vijaya Abstract: The response to paper moisture of thin film Al₂O₃ optical waveguide has been studied. The changes in the transmission of thin film optical waveguide due to changes in relative humidity of paper used as in touch overlay have been reported in this paper. The output decreases due to the overlay of paper. The transmission of the waveguide depends on the moisture content, texture and colour of the paper. Higher moisture content in paper tends to saturate the waveguide output. The sensitivity to moisture changes and type of paper is more for lower moisture content. Hysteresis is observed due to all the papers studied. The larger sensitivity in the lower moisture range may provide a means for detecting and controlling moisture in paper for packing, printing and other applications, as this overlay method requires only a small piece of paper. Page(s): 549-551

2006-12-01T00:00:00Z Keshavarz, M H Tehrani, M Kavosh Pouretedal, H R Semnani, A http://nopr.niscpr.res.in/handle/123456789/7594 2010-03-08T16:30:58Z 2006-12-01T00:00:00Z

Title: New pathway for quick estimation of gas phase heat of formation of non-aromatic energetic compounds Authors: Keshavarz, M H; Tehrani, M Kavosh; Pouretedal, H R; Semnani, A Abstract: A new theoretical approach is presented for calculation of gas phase heats of formation of non-aromatic energetic compounds. It is based on elemental composition and various functional groups of C_aH_bN_cO_d non-aromatic energetic compounds. Gas phase heats of formation for 85 non-aromatic energetic compounds are compared with experimental data as well as semi-empirical quantum mechanical PM3 prediction. Root mean square (rms) of deviation for some of them, where experimental data are available, shows 5.1 and 6.7 kcal/mol for new and semi-empirical quantum mechanical PM3 methods respectively. Page(s): 542-548

2006-12-01T00:00:00Z Suresha, B Chandramohan, G Sadananda Rao, P R Sampathkumaran, P Seetharamu, S Venkateswarlu, Vartha http://nopr.niscpr.res.in/handle/123456789/7593 2010-03-08T16:30:54Z 2006-12-01T00:00:00Z

Title: Friction and slide wear characteristics of glass-epoxy and glass-epoxy filled with SiCp composites Authors: Suresha, B; Chandramohan, G; Sadananda Rao, P R; Sampathkumaran, P; Seetharamu, S; Venkateswarlu, Vartha Abstract: This paper highlights the friction and wear behaviour of glass-epoxy (G-E) composites with and without silicon carbide particles (SiCp) filler content as a function of sliding distance, keeping the sliding velocity and applied load constant. It is seen that the wear rate increases with increasing sliding distance, but the gradient is not maintained the same all through. An attempt has also been made to correlate the wear loss of the worn surfaces using scanning electron microscopic (SEM) observations. The coefficient of friction is found to be almost same over a wide range of sliding distance employed. Further, the study<i style=""> </i>indicates that the SiCp-G-E composites show lower coefficient of friction and lower slide wear loss compared to G-E composites irrespective of the sliding distance employed. It is found that during the running in wear, the wear of the resin mix as well as very few broken fibers are noticed. The breakage of fibers, the matrix debris formation and interface separation take place at a much later stage (i.e., in the severe wear region). In the steady state region some of the broken fibers are getting disoriented in the matrix and also agglomerations of the debris are seen. Other interesting SEM features have been noticed and discussed taking into account the addition of SiCp filler content (2.5 and 5.0 wt. %). Page(s): 535-541

2006-12-01T00:00:00Z Rao, V Venkateswara http://nopr.niscpr.res.in/handle/123456789/7592 2010-03-09T16:30:49Z 2006-12-01T00:00:00Z

Title: A structural study of copper-43at% cadmium alloy Authors: Rao, V Venkateswara Abstract: A Cu-43at%Cd alloy was solidified at different cooling rates ranging from 10⁰ to 10⁶ K/s. For rapid solidification, (cooling rate ~10⁶ K/s), a modified gun splat cooling technique was employed. Metastable crystalline and amorphous phases were obtained.&nbsp; Solid-state transformation of the alloy into equilibrium Cu₄Cd₃ was accelerated on increasing the cooling rate. Page(s): 531-534

2006-12-01T00:00:00Z