Question: Which institute is this Indian theoretical physicist who contributed to studies of S-branes a visiting professor at?

<P0-S0>  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. <P0-S1> In string theory, an S-brane is a hypothetical and controversial counterpart of a D-brane, which, unlike a D-brane, is localized in time. <P0-S2>  Depending on the context the "S" stands for "Strominger", "Sen", or "Space-like". <P0-S3>  They are thought to be extended in the space-like/temporal directions only, so that they exist at only one point in time, but are otherwise analogous to p-branes. <SEP> <P1-S0> Duncan McCargo is Professor of Political Science at the University of Leeds. <P1-S1>  Since the beginning of 2015, he has held a shared appointment at Columbia University, where he is a Visiting Professor of Political Science and teaches every spring semester. <P1-S2>  McCargo is also a visiting scholar at the Weatherhead East Asian Institute, Columbia University, and an associate fellow of the New-York-based Asia Society. <P1-S3>  He holds three degrees from the University of London: a First in English (Royal Holloway 1986); an MA in Area Studies (Southeast Asia) (1990); and a PhD in Politics (1993) (both graduate degrees from the School of Oriental and African Studies). <P1-S4>  He has also taught at Queen's University, Belfast, and at Kobe Gakuin University, Japan. <P1-S5>  In 2006-07, he was a visiting senior research fellow at the Asia Research Institute, National University of Singapore. <P1-S6>  He served as a distinguished visiting professor at Universiti Utara Malaysia in September 2011. <P1-S7>  During the 2015-16 academic year, he was a Visitor at the School of Social Science, Institute for Advanced Study, Princeton. <SEP> <P2-S0>  He also is the Morningstar Visiting professor at MIT and a distinguished professor at the Korea Institute for Advanced Study. <P2-S1>  His main area of work is String Theory. <P2-S2> Ashoke Sen, FRS ( ; Bengali: অশোক সেন ; born 1956) is an Indian theoretical physicist and distinguished professor at the Harish-Chandra Research Institute, Allahabad. <P2-S3>  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”. <P2-S4>  Of the prizes for theoretical physics, the Fundamental Physics Prize is the one which pays the most prize money. <SEP> <P3-S0> Bidyendu Mohan Deb (born 1942) is an Indian theoretical chemist, chemical physicist and a professor at the Indian Institute of Science Education and Research, Kolkata (IISER). <P3-S1>  he is known for his studies in theoretical chemistry and chemical physics. <P3-S2>  He is an elected fellow of The World Academy of Sciences, Indian National Science Academy and the Indian Academy of Sciences. <P3-S3>  The Council of Scientific and Industrial Research, the apex agency of the Government of India for scientific research, awarded him the Shanti Swarup Bhatnagar Prize for Science and Technology, one of the highest Indian science awards, in 1981, for his contributions to chemical sciences.