Clustering of Gamma-Ray bursts through kernel principal component analysis

We consider the problem related to clustering of gamma-ray bursts (from "BATSE" catalogue) through kernel principal component analysis in which our proposed kernel outperforms results of other competent kernels in terms of clustering accuracy and we obtain three physically interpretable groups of gamma-ray bursts. The effectivity of the suggested kernel in combination with kernel principal component analysis in revealing natural clusters in noisy and nonlinear data while reducing the dimension of the data is also explored in two simulated data sets.Comment: 30 pages, 10 figure

Child abuse: A reality to be exposed

I occasionally write on topics relating to psychology since I am a trained psychoanalyst. One of the evils which plagues us is child abuse which a psychologist had correctly called soul murder in the 1990s. This article was written to sensitize parents. And also is philosophy (of evil) in praxes

The Princeton Handbook of World Poetries

Roland Greene and Stephen Cushman have revived the 1950s' edition of this book. & it is worth reading even by philosophers for in the final analysis, from Plato to Blanchot to Jean-Luc Marion are all poets. Where does poetry end and philosophy begin!!?

Accretion of multi-species plasma onto black holes

Matter falling onto a black hole is trans-relativistic, transonic, and close to the horizon it is sub-Keplerian. Such a flow shows the existence of multiple critical point, shocks etc. Employing relativistic equation of state and realistic composition, it has been shown that the solution strongly depend on the composition of the fluid. Electron-positron fluid is the least relativistic, to the extent that multiple critical points, shocks etc do not form. The most relativistic fluid is the one whose ratio of proton to electron number density is ~ 0.2. Since the solution strongly depend on composition, the emitted radiation should strongly depend on the composition too.Comment: Pages 3, 2 figures. Proceedings of the Twelfth Marcel Grossmann Meeting on General Relativity, edited by Thibault Damour, Robert T. Jantzen and Remo Ruffini. ISBN 978-981-4374-51-4. Singapore: World Scientific, 2012, p.98