Report summary

University of Pennsylvania Department of Physics and Astronomy in 2015-2026 reads as a 77-PI network with 105 internal PI collaborations. The dominant subject mix is Physics and Astronomy as the leading field (33% of slots across 45 PIs; 45 labels), Nuclear and High Energy Physics as the leading subfield (13% of slots across 24 PIs; 24 labels), and Cosmology and Gravitation Theories as the leading topic (8% of slots across 18 PIs; 18 labels). That is promising: collaboration is not just one large hairball, and the leading breakdown groups cover 26 PIs across distinct clusters. The leading PI names are Danielle S. Bassett (86 weighted works; Functional Brain Connectivity Studies, Neural dynamics and brain function); H. T. Fortune (82.4 weighted works; Nuclear physics research studies, Atomic and Molecular Physics). The most visible ties are Christopher B. Murray and Cherie R. Kagan (54 shared works, weight 27). The leading breakdown groups are group 1 with 10 PIs, 9 internal connections, weight 47.9, around Materials Chemistry, Radiology, Nuclear Medicine and Imaging, Cell Biology, led by Dennis E. Discher, Arjun G. Yodh, Wesley B. Baker.