The spectrum of the simplest 1D convection-diffusion operator is a discrete subset of the negative real axis, but the pseudospectra are regions in the complex plane bounded approximately by parabolas. Put another way, the norm of the resolvent is exponentially large as a function of the Pdclet number throughout a certain approximately parabolic region. These observations have a simple physical ...

We provide a simple and short proof of multidimensional Borg-Levinson type theorem. Precisely, we prove that the knowledge spectral boundary data determine uniquely corresponding potential appearing in Schödinger operator on an admissible Riemannian manifold. also sketch uniqueness case incomplete data. The new results present work complete those existing literature.

K Gurava Reddy, A Subbarami Reddy J.Satish babu and M Chandra Sekhara Reddy Scientist (Extension), Scientist (Agronomy),Scientist (Pl. Path.), Scientist (Economics) Regional Agricultural Research Station, Lam, Guntur, ANGRAU, Hyderabad, A.P ABSTRACT: An Integrated Pest Management (IPM) project was implemented in Guntur district during the cropping season 2006-07 in six villages of Guntur distri...

CYSTICERCOSIS of the brain has been known for centuries and most of the earlier reports came from central Europe. MacArthur (1934) and Dixon and Hargreaves (1944) have aroused interest in the problem of cerebral cysticercosis recently. From India very many reports have been published about the cerebral manifestations of cysticercosis (Dogra and Ahern, 1935; Menon and Veliath, 1940; McRobert, 19...

This review provides an introduction to the use of parametric modelling techniques for time series analysis, and in particular the application of autoregressive modelling to the analysis of physiological signals such as the human electroencephalogram. The concept of signal stationarity is considered and, in the light of this, both adaptive models, and non-adaptive models employing fixed or adap...

FGM components are generally constructed to sustain elevated temperatures and severe temperature gradients. Low thermal conductivity, low coefficient of thermal expansion and core ductility have enabled the FGM material to withstand higher temperature gradients for a given heat flux. Examples of structures undergo extremely high temperature gradients are plasma facing materials, propulsion syst...