Complex sentence: He has authored/co-authored 135 research papers-all in reputed International Journals, out of which 100 research publications have resulted from his research work carried out exclusively at DIT/NSIT.
Split into simpler sentences: He has authored/co-authored 135 research papers-all in reputed International Journals. The last 100 of his research publications have resulted from his research work carried out exclusively at DIT/NSIT.