Chandigarh University

About: Chandigarh University is a education organization based out in Mohali, India. It is known for research contribution in the topics: Materials science & Computer science. The organization has 1358 authors who have published 2104 publications receiving 10050 citations.

Performance Evaluation of Free Space Optical (FSO) Communication Link: Effects of Rain, Snow and Fog

Abstract: Free Space Optical (FSO) Communication is the transmission of data using optical beam through free space. It requires the line of sight condition to be maintained between the transmitter and receiver in order to transmit data. High data rates, license-free spectrum and low deployment cost are some of the advantages of FSO link. But the attenuation due to atmospheric conditions is a major factor responsible for the degradation of performance of FSO link. Depending upon the weather conditions of a particular place, the performance of FSO system varies accordingly. So in this paper, we have analysed the attenuation coefficient for different weather conditions. The effects of rain, snow and fog on the performance of FSO link has been analyzed in terms of attenuation coefficient along with the study of turbulent nature of free space optical communication link employing Gamma-Gamma Turbulence Model.

Impact of CuS on the crystallization kinetics of Na 2 S-P 2 S 5 glasses

Abstract: The x CuS-45P 2 S 5 -(55 − x )Na 2 S (mol% 2.5 ≤ x ≤ 10) glasses are synthesized through melt-quench method. Compositional dependent local structure, thermal stability, crystallization kinetics and electrical conductivity are investigated through various techniques. X-ray diffraction showed that a crystalline peak of Cu 1.8 S is observed in all the glass samples. The intensity of Cu 1.8 S peak increases with the addition of CuS in the glass samples. The de-polymerization of phosphate structural units from Q 2 → Q 1 → Q 0 is observed by increasing CuS content, as evidenced from FT-IR and Raman studies. The glass transition temperature ( T g ) and crystallization temperature ( T c ) peaks shift towards higher temperature with increased CuS content. This phenomenon indicates that the thermal stability of the glass samples enhanced with increase in CuS content. The crystallization kinetics is investigated using Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS) methods. It is observed that the trend of activation energies remains identical in both crystallization zones, as calculated from both methods. The mechanism involved during the crystallization of glass samples is proposed by evaluating Local Avrami exponent (LAEX). The room temperature electrical conductivities were measured and the maximum value of ac (2.86 × 10 − 4 S cm − 1 ) and dc (3.85 × 10 − 5 S cm − 1 ) conductivities were obtained for 10CuS-45P 2 S 5 -45Na 2 S glass sample. The dielectric response of the sample was also investigated and the dielectric constant was found maximum for 10CuS-45P 2 S 5 -45Na 2 S glass sample.

A Review Analysis on Face Recognition System with User Interface System

Abstract: Face recognition is the most advanced way of authentication and authorization and it has been developed a lot since the last decade and such systems are now popular in fields such as security and commerce. This work revolves around facial recognition based automated user management system with active learning features the proposed work uses a combination of a couple of technologies to build such a system for user keeping which is foolproof and secure it also adds active learning to counter the problem of changing faces in youngsters. The system is recommended for schools, universities, corporate offices, and prisons.