Some fixed point theorems in partial metric spaces

Here we prove two fixed point theorems on partial metric space, which was defined by S. Matthews [8] in 1994. In the literature one can find fixed point theorems proved on such spaces by using Picard iteration schemes. Here our main ingredient is Cantor intersection type results.The first author is being supported by University Grants Commission’s (Regional office, Kolkata) Minor Research Project (letter no. F.PSW-032/11-12(ERO), dated 08.08.11) for this work.Publisher's Versio

Development of SQUID-based non-destructive evaluation system for detecting fatigue induced transformation of δ-ferrite to non-magnetic phases

A SQUID based NDE set up based on a precision XY scanner developed and used to evaluate the transformation of δ-ferrite to non-magnetic phases during fatigue in weldment samples has been described. The SQUID based NDE system comprises of a SQUID insert housed in a liquid helium cryostat, precision XY scanner for the sample movement and the data acquisition module to acquire the SQUID output signal with respect to the sample coordinates for flat plate as well as cylindrical samples. The system has been used to detect δ-ferrite content of virgin and fatigue tested austenitic stainless steel weldments