NOPR Collection:

Electrical Properties of lead free ceremics Na1−XKxNbO3, at x=0.305.

2020-11-01T00:00:00Z

Title: Electrical Properties of lead free ceremics Na1−XKxNbO3, at x=0.305. Authors: Negi, Jyotsana; Singh, Surendra; Panwar, N S Abstract: By solid state reaction method, ceramic pellets of Na_0.695K_0.305NbO₃ have been prepared. X-ray- diffraction, Piezo properties, scanning electron microscope, and temperature dependence of dielectric constant and loss tangent of the prepared samples have been studied. It has been observed that, at the transition temperature, dielectric constant peak shifts to lower temperature, and the dielectric constant and loss tangent peak heights decrease, with increasing frequency, and show three structural phase transitions. Page(s): 783-786

Performance Evaluation of a novel dense hybrid passive optical network for acceptable modulation technique using EDFA amplifiers

2020-11-01T00:00:00Z

Title: Performance Evaluation of a novel dense hybrid passive optical network for acceptable modulation technique using EDFA amplifiers Authors: Kumar, Ghanendra; Kumar, Sandeep Abstract: Good rating services in terms of high speed data rate, good quality video signal and high speed telecommunication is the prime requirement for the current customers which have resolved in this research work for the first time best of our knowledge for 200 customers with the power amplification from EDFA optical amplifiers. Further, transmission of three play services signals have carried out from different modulation techniques (RZ, NRZ, Manchester, DBPSK and DQPSK modulator) to get the best outcomes. Furthermore, analysis of recommended dense hybrid passive optical network (DHPON) has also done in terms of bit error rate (BER), quality factor (Q-factor), and jitter. Final evaluation has recommended that RZ modulation technique is the acceptable choice to deliver the best services for the customers end. Page(s): 787-794

Study of biocompatible polymer blend films with tuneable band gap

2020-11-01T00:00:00Z

Title: Study of biocompatible polymer blend films with tuneable band gap Authors: Bhavsar, Vaishali; Tripathi, Deepti Abstract: In present communication, an attempt is made to prepare and study structural, optical, and electrical properties of biocompatible polyvinylchloride (PVC)-polyvinylpyrrolidone (PVP) blend films taken in ratio of 1:1 doped with conducting polymer Polypyrrole (PPy).The XRD spectra revealed amorphous nature of all the films under investigation. The Fourier transform infra-red spectroscopy (FTIR) study of conducting polymer doped blend films indicate a significant change in the intermolecular/intramolecular interactions taking place. The study on electrical properties of conducting polymer doped blend films show better conduction of current as compared to that of blend film without conducting polymer and dopant concentration dependent electrical conductivity and conduction mechanism. The results of optical study of conducting polymer doped blend films revealed the possibility of band gap modification from wide band gap to small band gap with suitable doping concentration. These biocompatible blend films with tuneable optical and electrical properties can be potential material for use in fields of photonic biosensors, solar cell and optoelectronics field. Page(s): 795-803

Force and temperature analysis during distinct machining environment using an optimization approach

2020-11-01T00:00:00Z

Title: Force and temperature analysis during distinct machining environment using an optimization approach Authors: Sharma, Anurag; Singh, R C; Singari, Ranganath M; Bhandarkar, S L Abstract: Cryogenic cooling with liquid nitrogen has a wide field of scientific and engineering applications. The aim of the presented research work is to analyze the impact on cutting force and temperature during the LN₂ single supply at (i) rake face and double supply (ii) rake and flank face of TiN coated carbide cutting tool during turning of AISI D3 steel. Taguchi based S/N ratio was used for Design of Experiments (DoE) of L₁₈ orthogonal array. The four control factors were selected. The three factors like speed, feed and depth of cut were varied to three levels. The fourth factor was the machining condition which was varied to two levels. The cutting force and temperature were declined by 32-48% and 34-46% during the double supply of LN₂ at rake and flank face as compared to single supply at rake face. The influence and percentage of contribution of each factor were found out by Analysis of Variance (ANOVA). The double supply method with LN₂ supply at rake and flank face had the highest effect of contribution in the percentage as 77.13% and 87.42% for cutting force and temperature respectively. The values obtained during confirmatory runs were very close to the optimized results within the limits. Page(s): 804-811