University of Rajasthan

About: University of Rajasthan is a education organization based out in Jaipur, India. It is known for research contribution in the topics: Chemical shift & Derivative (chemistry). The organization has 15058 authors who have published 15733 publications receiving 117400 citations. The organization is also known as: Rajasthan University.

Multi-constraints link stable multicast routing protocol in MANETs

Abstract: In MANETs, real-time multimedia applications make Quality of Service ( QoS ) support, a crucial issue regarding terms of increased throughput, reduced jitter, and available bandwidth. Most of the existing routing protocols focus on straight forward hop-count metric and are less adaptable to densely distributed and highly mobile networks. Therefore, Multicast communication with QoS in densely populated highly dynamic network an exciting research challenges. The objective of the present paper is to introduce a QoS aware routing metric that determines a reliable forwarding node based on Link Stability cost Function ( LSF ). A mesh of Multicast routes between Multicast source and destinations has been established using nodes with a maximum LSF . The principle theme underlying our protocol is optimum contention count that can be estimated with the help of received signal strength. The proposed protocol comprises the following stages:(1) Calculation of Link Stability Factor (2) Determination of maximum LSF value (3) Pruning adjacent nodes (4) Creation of a mesh consisting of more stable forwarding nodes (5) Creation of a mobile network in which no node remains isolated, as well as nodes, face lesser contention. Our proposed protocol has been demonstrated on an existing mesh-based Multicast routing protocols, ODMRP. Simulations are carried out on Exata/Cyber simulator, and obtained results are compared with that of ODMRP. The comparative analysis reveals that our protocol is more efficient in contrast to ODMRP, LSMRP, and MMRNS, regarding performance parameters like Packet Delivery Ratio ( PDR ), Average End-to-End Latency and Average Route Lifetime. Also, we have analyzed the impact of minimum and maximum contention count on PDR and delay.

Kinetic studies of bulk Se85-xTe15Sbx glasses with x = 0, 2, 4, 6, 8 and 10

Abstract: Results of Differential Scanning Calorimetry (DSC) under non-isothermal condition of Se 85-x Te 15 Sb x (x = 0, 2, 4, 6, 8 and 10) glasses are reported and discussed. The glass transition temperature at different heating rates and structural changes during glass transition have been determined from an empirical relation. The activation energies for crystallization have been determined from the heating rate dependence of the peak crystallization temperatures. The results have been analyzed using Kissinger's and Matusita's equations and the modified Ozawa equation for non-isothermal crystallization of materials. The variation of the glass transition temperature with composition suggests that a small amount of Sb(4 at%) leads to an increase in the chain length of Se-Te, whereas further increase in the Sb atomic percentage increases the number of Se-Te chains in the alloys. The thermal stability (T c - T g ) is found to be maximum at 4 at% Sb and suggests that this alloy can be considered as a critical composition at which the system becomes chemically ordered. Moreover, the minimum heat released during crystallization at this composition confirms the maximum stability of the alloy.

Produced particle multiplicity dependence on centrality in nucleus-nucleus collisions

Abstract: An equation is presented, which allows us to calculate the dependence of the multiplicity of the particles produced in nucleus - nucleus collisions, , on an experimentally measured value , which is strongly correlated to the impact parameter b. The equation combines data from a wide range of projectile masses ( - 197) over a large momentum region . The possible meaning of the parameters is discussed in the context of a simple geometrical model.