/ http://www.slideshare.net/images/logo.gif / 際際滷Share feed for 際際滷shows by User: drgvnrao https://public.slidesharecdn.com/v2/images/profile-picture.png I was the Head, Materials Characterisation & Testing Group at the time of superannuation (July 2010). An expert in X-Ray Diffraction (XRD) characterisation of materials and written several thousands of software programs for crystal structure / phase identification of materials.