2001 SINGHVI, Ashok Kumar (b. 1950) PhD,FNA,FASc,FTWAS, DST Year of Science Chiar Professor, AMOPH Division,PRL; Physical Research Laboratory, Navrangpura, Ahmedabad – 380009; Res. B-31, Shakti Enclave, Satya Marg, Near Judges Bungalows, Bodakdev, Ahmedabad – 380054; Tel: (079) 26855831(R), 09099061962(M); Email: ; Sp. Geosciences (Quaternary, Geochronology, Paleoclimate,Radiation Effects in Minerals).