The Legends and History of the Javadi Hills People

Javadi Hills is the eastern chain of hills comprising Vellore district, Thiruvannamalai district, and Tirupattur district. The people living in these hills call themselves Malayalis. They have nothing to do with the Malayalis living in the state of Kerala. They live in the hills of Yelagiri Hill, Kolli Hills, Sitheri Hills, and Pachaimalai Hills in Tamil Nadu. But marriages happen between the people of these hill areas. They are the majority of the 37 tribes in Tamil Nadu. One hundred and four villages (184) in fourteen panchayats on this hill are the domains of this study. These Malayalis tell folktales as songs and stories. It can be seen that the custom of telling this as stories by men and songs by women can be seen. And they do not tell these stories all the time. It is noteworthy that they sing only during festivals or among researchers who conduct research on this community. Similarly, this review article explains that the songs narrating stories related to them are in circulation only among a few senior tribal people

Robust Beamforming for Secrecy Rate in Cooperative Cognitive Radio Multicast Communications

In this paper, we propose a cooperative approach to improve the security of both primary and secondary systems in cognitive radio multicast communications. During their access to the frequency spectrum licensed to the primary users, the secondary unlicensed users assist the primary system in fortifying security by sending a jamming noise to the eavesdroppers, while simultaneously protect themselves from eavesdropping. The main objective of this work is to maximize the secrecy rate of the secondary system, while adhering to all individual primary users' secrecy rate constraints. In the case of passive eavesdroppers and imperfect channel state information knowledge at the transceivers, the utility function of interest is nonconcave and involved constraints are nonconvex, and thus, the optimal solutions are troublesome. To address this problem, we propose an iterative algorithm to arrive at a local optimum of the considered problem. The proposed iterative algorithm is guaranteed to achieve a Karush-Kuhn-Tucker solution.Comment: 6 pages, 4 figures, IEEE ICC 201

Nuclear reaction studies of unstable nuclei using relativistic mean field formalisms in conjunction with Glauber model

We study nuclear reaction cross-sections for stable and unstable projectiles and targets within Glauber model, using densities obtained from various relativistic mean field formalisms. The calculated cross-sections are compared with the experimental data in some specific cases. We also evaluate the differential scattering cross-sections at several incident energies, and observe that the results found from various densities are similar at smaller scattering angles, whereas a systematic deviation is noticed at large angles. In general, these results agree fairly well with the experimental data.Comment: 9 pages, 7 figures, submitted to PR