What Fundamental Physics Prize winner created and studied another version of S-brands that differed from the work of AndrewStrominger?
S-brane:  The S-brane was originally proposed by Andrew Strominger in his speculative paper with Michael Gutperle, and another version of S-branes was studied by Ashoke Sen. Ashoke Sen:  He was among the first recipients of the Fundamental Physics Prize “for opening the path to the realisation that all string theories are different limits of the same underlying theory”.
Ashoke Sen